319 results on '"Dental impression"'
Search Results
2. Calibrated intraoral scan protocol (CISP) for full‐arch implant impressions: An in vitro comparison to conventional impression, intraoral scan, and intraoral scan with scan‐aid.
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Li, Junying, Chen, Zhaozhao, Nava, Paolo, Yang, Shengtao, Calatrava, Javier, and Wang, Hom‐Lay
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DENTAL impressions , *DENTAL implants , *EDENTULOUS mouth , *PROSTHETICS , *SCANNING systems - Abstract
Objective: To assess a newly developed intraoral scan protocol in enhancing the accuracy of complete‐arch implant impressions. Materials and Methods: Four impression approaches were applied to the same maxillary edentulous model with 6 implants: (1) intraoral scan (IOS), (2) intraoral scan with scan aid (IOS‐SA), (3) calibrated intraoral scan protocol (CISP), and (4) conventional splinted open‐tray impression (CONV). Each approach was repeated 10 times, and a direct scan of the model with a desktop scanner was used as a reference model. The alignment of scans and the reference model was conducted by two methods: (a) aligning all scan bodies to evaluate the overall fit, and (b) aligning the first and second scan bodies to simulate the Sheffield fit test for passive fitting of multiple implant‐supported prostheses. Linear deviations from the reference model (trueness) and within each group (precision) were analyzed using Python scripts. Results: When aligned by all scan bodies, the CISP group exhibited comparable mean trueness (38.33 μm) and precision (45.97 μm) to the CONV group (44.30 and 47.92 μm respectively), both of which significantly outperformed the IOS group (86.82 and 83.17 μm, respectively). Furthermore, in the virtual Sheffield fit test, the CISP group achieved the highest levels of mean trueness at the end span (121.7 μm), making a linear deviation reduction of 36.7%, 60%, and 41.4% when compared to the CONV, the IOS, and the IOS‐SA groups, respectively. Moreover, the CISP group (104.3 μm) displayed a remarkable 65, 182, and 86 μm advantage in precision over the CONV, IOS, and IOS‐SA groups, respectively. Conclusion: CISP demonstrated comparable accuracy to the gold standard, the conventional splinted open‐tray impression. Furthermore, it excelled in the virtual passive fitting test. [ABSTRACT FROM AUTHOR]
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- 2024
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3. Det digitale aftryk versus det analoge aftryk.
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HADDADI, YASSER
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Copyright of Tandlaegebladet is the property of Tandlaegeforeningen and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
4. STUDY OF THE LEVEL OF KNOWLEDGE ABOUT HAND DISINFECTION AND THE APPLICATION OF ROUTINE DISINFECTION MEASURES AMONG DENTAL TECHNICIANS
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Velina Stoeva, Meri Hristamyan, and Aleksandar Atanasovski
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dental technician ,dental impression ,disinfection ,Dentistry ,RK1-715 ,Medicine (General) ,R5-920 - Abstract
Purpose: To study the level of knowledge about hand disinfection and the application of routine disinfection measures in everyday practice among dental technician students from the Medical College of Plovdiv and practicing dental technicians. Material and methods: For the period September 2019 - January 2020, an anonymous 19-question survey was conducted among a total of 92 dental technicians. All statistical analyses were performed with SPSS version 24. A p-value below 0.05 was considered statistically significant. Results: Of the respondents, 34.8% (n = 30) were students, and 65.2% (n = 62) were practicing dental technicians. The majority (77.2% (n = 71)) rate the hands as a factor for the transmission of microorganisms from person to person, but for 16.3% (n = 15), the hands pose a risk only if they are visibly contaminated. Only 31.5% (n = 29) disinfect their hands for the recomended 30 seconds. When working with dental impressions and dentures, 59.8% (n = 55) know that they must always be disinfected before working with them. The most commonly used preparations for disinfection of impressions are alcohols in 44.6% (n = 41), but 22.8% (n = 21) wrongly only use water and soap. Only 1/3 correctly state that the finished dentures should be disinfected before being handed to the dentist. Conclusion: Effective communication and coordination between the dental laboratory technicians and the dental office staff are critical components of a successful infection control program related to dental care.
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- 2024
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5. Knowledge, attitude, and practice of dental health professionals toward dental impression disinfection protocol during the COVID-19 pandemic in Saudi Arabia– a cross-sectional study
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Abdullah Salman Binassfour, Mohammad Abdul Baseer, and Navin Anand Ingle
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COVID-19 ,KAP study ,Dental impression ,Disinfection ,DHPs ,Coronavirus prevention ,Special aspects of education ,LC8-6691 ,Medicine - Abstract
Abstract Background Despite the updated guidelines on dental impression disinfection protocols during the COVID-19 pandemic, adherence to such procedures has not been studied among dental health professionals in Saudi Arabia. Understanding DHPs’ knowledge, attitudes, and practices regarding COVID-19 is crucial in assessing a willingness to adhere to the recommendations provided by health authorities in mitigating the spread of COVID-19 via dental impressions impacting patient safety and infection control measures. Hence, this study aimed to assess dental health professionals’ (DHPs) knowledge, attitudes, and practices (KAP) toward dental impression disinfection protocol during the COVID-19 pandemic in Saudi Arabia. Methods A cross-sectional study using an online survey was conducted from 14 December 2022 to 21 March 2023 among practicing dentists, dental assistants (DA), dental laboratory technicians (DT), and dental hygienists in Saudi Arabia. A validated and reliable questionnaire that consisted of 38 items along with demographic variables was prepared to collect the data. Using Google Forms, a questionnaire link was prepared and shared on the social media platforms of DHPs in Saudi Arabia. A descriptive analysis was conducted to report the percentages and frequencies. The mean knowledge, attitude, and practice scores were analyzed using an Independent t-test, ANOVA, and Pearson’s correlation tests. Results A total of 718 DHPs voluntarily participated in the survey. Most of the DHPs exhibited average knowledge 392 (54.6%), neutral attitudes 393(54.7%), and adequate 549 (76.5%) practice towards dental impression disinfection protocol. The mean knowledge score differed significantly across nationality (p = 0.013), type of DHPs (p
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- 2024
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6. Comparison of Aversion to Visual Dental Stimuli Between Patients and Dentists: A Preliminary Study
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Tanaka S, Karibe H, Kato Y, Okamoto A, Koeda M, and Hama T
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dental anxiety ,pain perception ,visual stimuli ,dental impression ,visual analog scale ,Medicine (General) ,R5-920 - Abstract
Satoshi Tanaka,1 Hiroyuki Karibe,1 Yuichi Kato,1 Ayuko Okamoto,1 Michihiko Koeda,2 Tomoko Hama3 1Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan; 2Department of Neuropsychiatry, Nippon Medical School, Tokyo, Japan; 3Department of Medical Technology, Faculty of Health Sciences, Ehime Prefectural University of Health Sciences, Ehime, JapanCorrespondence: Hiroyuki Karibe, Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku, Tokyo, 102-8159, Japan, Tel +81 3 3261 6524, Fax +81 3 5216 3720, Email h-karibe@tky.ndu.ac.jpPurpose: Fearful dental patients often cite various dental instruments or procedures as triggers for their dental fear. Thus, visual dental stimuli provoke anxiety. This preliminary study aimed to assess the level of aversion to visual stimuli in dental patients and compare it with that in dentists.Patients and Methods: A total of 43 dental patients (25 women, 18 men; average age, 29.9 ± 13.3 years; patient group) and 13 dentists (4 women, 9 men; average age, 28.2 ± 2.0 years; dentist group) were included. All participants had previously undergone dental treatment. The dental fear level was assessed using the self-reported Dental Fear Survey (DFS). Thirty-two images associated with dental treatment were prepared and classified into three categories: dental instruments, dental procedures, and the dental environment. All participants rated their level of disgust toward each image on a visual analog scale with scores ranging from 0 to 100.Results: In the patient group, the disgust ratings for tooth extraction, dental drilling, and local anesthesia were > 60, which were significantly different from those in the dentist group (Mann–Whitney U-test, p< 0.001, p=0.001, and p=0.001, respectively). The ranking order of the disgust ratings for the 32 images showed significant correlation between the patient and dentist groups (Spearman correlation coefficient, r=0.80, p< 0.001). In the patient group, the disgust ratings for dental impressions and the interdental brush, dental light, and dental chair were significantly correlated with DFS scores (r=0.61, p< 0.001; r=0.47, p=0.001; r=0.41, p=0.006; and r=0.40, p=0.008, respectively).Conclusion: This study revealed that patients have more negative feelings toward invasive procedures than dentists. However, a significant correlation was identified between the ranking of aversion-provoking dental stimuli by patients and dentists. Furthermore, the level of aversion to several dental-related items that do not cause pain was correlated with the dental fear level.Keywords: dental anxiety, pain perception, visual stimuli, dental impression, visual analog scale
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- 2024
7. Knowledge, attitude, and practice of dental health professionals toward dental impression disinfection protocol during the COVID-19 pandemic in Saudi Arabia– a cross-sectional study
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Binassfour, Abdullah Salman, Baseer, Mohammad Abdul, and Ingle, Navin Anand
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- 2024
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8. Elastic Recovery Properties of Alginate Impression Materials Based on Red Algae Kappaphycus alvarezii.
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Indahyani, Didin Erma, Barid, Izzata, Nafisah, Praharani, Depi, Sumono, Agus, Probosari, Niken, and Sulistiyani
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DENTAL impression materials ,RED algae ,ALGINIC acid ,ELASTICITY ,DENTAL materials - Abstract
Alginate impression materials in dentistry are used to form details of the oral cavity organs. The alginate content in the impression material functions to form a gel. One source of alginate is algae. Objective: This study aims to determine the recovery elasticity and setting time of alginate impression materials made from red algae K. alvarezii. Methods: The sodium alginate in the composition of this alginate impression material was extracted from red algae K. alvarezii. The alginate impression material was tested for setting time and recovery elasticity and compared with commercial impression material (Hygedent®). Results: The elastic recovery of red algae sodium alginate impression materials was 97.43% which was not significantly different from the commercial impression materials (98.42%). These results showed that this alginate impression material has the same properties as commercial impression materials. In the setting time test, the the red algal alginate impression material was much longer than the commercial impression material, 1.39 m and 3.30 m respectively. Conclusion: It was concluded that the alginate impression material from the red algae K. alvarezii had a long setting time. At the same time, the recovery of elasticity did not differ from that of commercially available alginate impression materials. [ABSTRACT FROM AUTHOR]
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- 2023
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9. Tactile misfit detection ability at the implant-abutment interface of internal connection dental implants: an in-vitro study.
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Molinero-Mourelle, Pedro, Peter, Lukas, Gaviria, Ana Sol, Fonseca, Manrique, Schimmel, Martin, and Katsoulis, Joannis
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DENTAL implants , *DENTAL abutments , *DENTAL impressions , *STATISTICAL significance , *MEDICAL personnel - Abstract
The aim of this in-vitro study was to investigate the tactile assessment ability at the implant impression-taking stage. Thirty clinicians (18 novices, 12 experts) were included for a tactile fit assessment by using a used/new probe (tip diameter 100 µm/20 µm). Six implant replicas and related impression copings of two internal connection implant systems were used, each with a perfect fit (0 µm) and defined vertical micro gaps of 8, 24, 55, 110 and 220 µm at the interface. Statistical analysis was performed using descriptive methods and non-parametric tests with a focus on specificity (ability to detect perfect fit), sensitivity (ability to detect misfit), and predictive values. P-values <5% were considered statistically significant. The tactile assessment showed a mean total sensitivity for the Straumann and Nobel Biocare systems of 83% and 80% with a used probe, and 91% and 92% with a new probe, respectively. The mean total specificities were 33% and 20% with a used probe and 17% and 3% with a new probe, respectively. No statistical significance was observed between novice and expert clinicians concerning their tactile assessment ability. The ability to detect a perfect fit (specificity) with a probe was very poor for both implant systems and impaired with the use of a new probe. The use of a new probe improved the gap detection ability (sensitivity) significantly at the expense of the specificity. A combination of additional chairside techniques with training and calibration could improve clinicians' ability to correctly assess the fit/misfit at the implant-abutment interface. [ABSTRACT FROM AUTHOR]
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- 2023
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10. 新型藻酸盐印模消毒流程对模型精度的影响.
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张佳园, 于德栋, 叶丽娟, 耶春兰, and 刘晶
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- 2023
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11. Reabilitarea orală totală, funcţională şi estetică - Prezentare de caz.
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Špadijer Gostović, Aleksandra
- Abstract
Copyright of dentalTarget is the property of dentalTarget and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
12. Enhancing intraoral scanner accuracy using scan aid for multiple implants in the edentulous arch: An in vivo study.
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Kernen, Florian, Brändle, Dominik, Wagendorf, Oliver, Recca, Mario, Mehrhof, Jürgen, Vach, Kirstin, Nahles, Susanne, Nelson, Katja, and Flügge, Tabea
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EDENTULOUS mouth , *SCANNING systems , *IN vivo studies , *SURFACE morphology , *CONFOCAL microscopy - Abstract
Objectives: Intraoral scans of multiple implants in the edentulous arch are challenged by the absence of a distinct surface morphology between scan bodies. A scan aid was applied in such situation and evaluated for intraoral scanning accuracy in vivo. Materials and Methods: 87 implants in 22 patients were scanned with scan aid (SA) and without scan aid (NO) using two different intraoral scanners (CS3600 [CS] and TRIOS3 [TR]). Master casts were digitized by a laboratory scanner. Virtual models were superimposed using an inspection software and Linear deviation and precision were measured. Statistical analysis was performed using linear mixed models (α =.05). Results: Total mean linear deviation within the CS group was 189 μm without scan aid and 135 μm when using the scan aid. The TR group's total mean deviation was 165 μm with and without a scan aid. Significant improvement with scan aid was observed for the CS group (p =.001), and no difference was found in the TR group. 96% of scan bodies were successfully scanned in the TR‐SA group compared to 86% for the TR‐NO group, 83% for the CS‐SA, and 70% for the CS‐NO group, respectively. Conclusions: The evaluated scan aid improved linear deviation compared to unsplinted scans for the CS group but not for the TR group. These differences could originate from different scanning technologies used, active triangulation (CS) and confocal microscopy (TR). The scan aid improved the ability to recognize scan bodies successfully with both systems, which could have a favorable clinical impact overall. [ABSTRACT FROM AUTHOR]
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- 2023
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13. The effect of current infection control procedures and application times on the dimensional stability of dental impression materials
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Sibel Dikicier
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disinfection ,dental impression ,dimensional stability ,sars-cov-2 ,Medicine - Abstract
Aims:In this study, the effects of different disinfection and sterilization methods and their application duration on the dimensional stability of impression materials were evaluated.Methods:Two impression materials, condensation (CS) and addition silicone (VPS), disinfectants with 5.25% sodium hypochlorite (NaOCl) immersion, 3% hydrogen peroxide immersion and steam autoclave were selected. Disc-shaped samples (n=112) were obtained in 7 subgroups of each material (n=8). Sixteen untreated samples served as controls. Dimensional change was measured with a digital micrometer in the reference lines on the sample.Results:The highest mean percentage of dimensional change for the 50 min autoclave was 0.10±0.03% for CS and 0.10±0.02% for VPS. The dimensional change in CS did not differ for hydrogen peroxide. Compared with the controls, dimensional change was significant in 20 min NaOCl and 50 min autoclave (p
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- 2023
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14. A Review on Risk Management of Coronavirus Disease 19 (COVID-19) Infection in Dental Practice: Focus on Prosthodontics and All-Ceramic Materials
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Roberto Sorrentino, Michele Basilicata, Gennaro Ruggiero, Maria Irene Di Mauro, Renato Leone, Patrizio Bollero, and Fernando Zarone
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coronavirus ,COVID-19 ,SARS-CoV-2 ,prosthodontics ,airborne ,dental impression ,Medicine - Abstract
Background: A novel β-coronavirus infection (COVID-19) was first detected in Wuhan city, spreading rapidly to other countries and leading to a pandemic. Dental professionals and patients are exposed to a high risk of COVID-19 infection, particularly in the prosthodontic practice, because of the bio-aerosol produced during teeth preparation with dental handpieces and the strict contact with oral fluids during impression making. This paper aimed to provide an overview to limit the risk of transmission of COVID-19 infections during prosthetic procedures in dental offices. Methods: An electronic search was conducted on the electronic databases of PubMed/Medline, Google Scholar, Embase, Scopus, Dynamed, and Open Grey with the following queries: (COVID-19) AND/OR (SARS-CoV-2) AND/OR (Coronavirus) AND/OR (contaminated surface) AND/OR (cross-infection) AND/OR (Prosthodontics) AND/OR (dental ceramic) AND/OR (glass-ceramic). A manual search was performed as well. Results: From the 1023 collected records, 32 papers were included. Conclusions: Dental offices are at high risk of spreading SARS-CoV-2 infection due to the close contact with patients and continuous exposure to saliva during dental procedures. Therefore, pre-check triages via telephone, decontamination, the disinfection of impressions, the sterilization of scanner tips, and the use of specific personal protective equipment, dental high-speed handpieces with dedicated anti-retraction valves, and effective mouthwashes are strongly recommended.
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- 2022
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15. The effect of current infection control procedures and application times on the dimensional stability of dental impression materials.
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Dikicier, Sibel
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DENTAL impression materials , *DISINFECTION & disinfectants - Abstract
Aims: In this study, the effects of different disinfection and sterilization methods and their application duration on the dimensional stability of impression materials were evaluated. Methods: Two impression materials, condensation (CS) and addition silicone (VPS), disinfectants with 5.25% sodium hypochlorite (NaOCl) immersion, 3% hydrogen peroxide immersion and steam autoclave were selected. Disc-shaped samples (n=112) were obtained in 7 subgroups of each material (n=8). Sixteen untreated samples served as controls. Dimensional change was measured with a digital micrometer in the reference lines on the sample. Results: The highest mean percentage of dimensional change for the 50 min autoclave was 0.10±0.03% for CS and 0.10±0.02% for VPS. The dimensional change in CS did not differ for hydrogen peroxide. Compared with the controls, dimensional change was significant in 20 min NaOCl and 50 min autoclave (p<0.05). Both impression materials in the autoclave showed statistically significant dimensional changes regardless of the time. The difference in application duration significantly affected the dimensional stability of the impression materials regardless of the procedure (p<0.001). Extended application duration did not affect the dimensional stability in the hydrogen peroxide for CS, NaOCl and autoclave for VPS. Conclusions: Chemical disinfection and autoclave sterilization caused statistically significant but clinically acceptable dimensional changes in CS and VPS impression materials used in this study. [ABSTRACT FROM AUTHOR]
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- 2023
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16. The Efficacy of Three Types of Disinfectants on the Microbial Flora from the Surface of Impression Materials Used in Dentistry—In Vitro Study.
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Cerghizan, Diana, Jánosi, Kinga Mária, Ciurea, Cristina Nicoleta, Popelea, Oana, Baloș, Monica Dora, Crăciun, Adriana Elena, Hănțoiu, Liana Georgiana, and Albu, Aurița Ioana
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DENTAL impression materials ,DENTAL materials ,DISINFECTION & disinfectants ,BACTERIAL colonies ,SURFACES (Technology) ,STAPHYLOCOCCUS aureus ,CANDIDA albicans - Abstract
During impressions, bacteria, viruses, and fungi remain on the impression material, representing a significant risk for the medical team (dentists, dental assistants, and laboratory technicians). Impression disinfectants have been introduced into dentistry to reduce the risk of cross-infection. This study was performed by examining the surface disinfection of five commonly used impression materials in prosthodontics: alginate-Tropicalgin (Zhermack
® ), condensation silicone-Zetaplus (Zhermack® ), Oranwash L (Zhermack® ); and addition silicone-Elite HD + Putty Soft (Zhermack® ), Elite + Light Body (Zhermack® ) after the disinfection with three disinfectants: Zeta 3 Soft (Zhermack® ), Zeta 7 Spray (Zhermack® ) and Zeta 7 Solution (Zhermack® ). Before disinfection, the impression materials were contaminated with Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, and Candida albicans ATCC 10213. Our results demonstrate the efficacy of the two examined specific disinfectants in reducing cross-infection risk. The surface disinfectant-spray is not adequate for impression disinfection. A high number of bacterial colonies were found on the surface of all impressions disinfected with this spray. The immersion-disinfection method effectively eliminates the risk of cross-infections (Kruskal–Wallis test showed a p < 0.001). [ABSTRACT FROM AUTHOR]- Published
- 2023
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17. Investigation of the Antimicrobial Effect of Different Disinfectants on Alginate Measurement Materials.
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Güntekin, Neslihan, Arslan, Gökçe Kader, Özdemir, Mehmet, and Tunçdemir, Ali Rıza
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DISINFECTION & disinfectants , *ALGINIC acid , *DENTAL impression materials , *STREPTOCOCCUS mutans , *CHILD patients - Abstract
Objective The impression materials are contaminated with pathogenic microorganisms carried by saliva and blood in the mouth. The aim of this study is to evaluate the antimicrobial activity of 1 and 5.25% sodium hypochlorite (NaClO) and zeta 7 solution, a commercial disinfectant, on alginate and to compare it washing with distilled water. Methods Samples obtained from alginate impressions taken from eight pediatric patients selected in accordance with the inclusion criteria with a size of 1 × 1 cm were subjected to five different disinfection protocols. After samples were vortexed in 3-mL physiological saline, 1-mL volume were inoculated onto brain heart infusion agar and cultured at 37°C for 72 hours to determine the number of colony-forming units/mL. Streptococcus mutans , Staphylococcus aureus , Escherichia coli , Candida albicans were used as control strains. The data obtained were statistically evaluated by using analysis of variance and post-hoc tests. The differences were considered statistically significant when p < 0.05. Results All of the disinfectant solutions tested were effective in the disinfection of the impression materials examined. The control group with no treatment and the water and flushing group had a significantly higher bacterial load compared to the other disinfectant-treated groups in terms of bacterial load, and no significant difference has been observed between the disinfectant solutions (p < 0.05). Simple rinsing of the impressions in sterile water reduced the number of microorganisms but did not decontaminate the impressions. Conclusion Washing with water alone is insufficient for measured disinfection. Although NaClO is an effective disinfectant even at low concentrations, microorganism growth was not observed at 5.25% concentration. It is appropriate to use NaClO at 1 and 5.25% concentrations for impression disinfection. [ABSTRACT FROM AUTHOR]
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- 2023
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18. Modelling and Impressions in Implants
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Dashaputra, Rajesh, Kachwala, Irfan, Aphale, Adwait, Chitnis, Snigdha, Chaughule, Ramesh S., editor, and Dashaputra, Rajesh, editor
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- 2021
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19. تأثیر زاویه قرارگیری ایمپلنت بر صحت اتصال ایمپرشن کوپینگ به ایمپلنتهای با هگز داخلی.
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منیره نادعلی, مجتبی بیانی, وحیده نظری, and حمت اله مرادزاده
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EXPERIMENTAL design , *DENTURES , *DENTAL impressions , *DENTAL abutments , *DESCRIPTIVE statistics , *RESEARCH funding , *PROSTHESIS design & construction , *PSYCHOLOGICAL adaptation - Abstract
Background and Aim Different implant angulation, which is unavoidable in clinical situations, can affect the accuracy of impression. This study aims to investigate the effect of implant angulation on the accuracy of placing impression coping on implants with internal hex. Methods & Materials A gypsum model of 4 implants with internal hex connection was prepared. The implants were installed in different mesiodistal angles of 0, 15, 25 and 35 degrees to the longitudinal axis in the gypsum model. To simulate the gums, a gingival material was injected around the implant analog with a height of 2 mm. After a training session for senior dental students on how to place the impression coping, 40 students were volunteered to place the impression copings on four implants. The accuracy of impression coping placement was evaluated by a prosthodontist. Data were statistically analyzed using Cochran Q test. Significance level was set at 0.05. Ethical Considerations This study was approved by the ethics committee of Arak University of Medical Sciences (Code: IR.ARAKMU.REC.1397.283). Results The percentage of correct impression coping placement on the implants at angles of 0, 15, 25 and 35 degrees was 85%, 72%, 52%, 35%, respectively. Except for implants at 0 and 15 degrees, a statistically significant difference was observed between different groups of implant angulation. Conclusion The implant angulation has a significant effect on the accuracy of impression coping placement on the implants with internal hex; by increasing the implant angulation, the accuracy of impression coping placement decreases. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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20. In vitro scanning accuracy using different aids for multiple implants in the edentulous arch.
- Author
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Kernen, Florian R., Recca, Mario, Vach, Kirstin, Nahles, Susanne, Nelson, Katja, and Flügge, Tabea V.
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DENTAL implants , *DENTAL impressions , *OPTICAL imaging sensors , *EDENTULOUS mouth , *ORAL surgery - Abstract
Objectives: Optical impressions of implants in the edentulous arch are challenged by the absence of distinct surface morphology between multiple implant scan bodies. The purpose of this in vitro study was to evaluate a newly developed scan aid in various designs and colors to improve the accuracy of multi‐implant scans. Materials and Methods: A universal scan aid in three different designs (circular, square, irregular) and three different materials (colors: beige, gray, white) was applied to the implant scan bodies of a master model of six implants in an edentulous maxilla. Ten scans using an intra‐oral scanner of each scan aid were acquired. Reference scanning was performed using a desktop optical scanner. Alignment of scans was performed at the first scan body in a three‐dimensional modeling and inspection software and deviations for trueness and precision were calculated using the signed nearest‐neighbor method and then statistically analyzed (α =.05). Results: Overall, the beige irregular scan aid had the highest trueness and showed significant differences compared to unsplinted scans. The precision showed more heterogenous results and decreased when using the scan aid. Ease of use was observed with the irregular gray scan aid due to its increased elongation at break. Conclusions: The evaluated scan aid led to improved trueness when compared to unsplinted scans. Even though the irregular design in beige color showed highest trueness, the poor fracture strength of the tested material requires further improvement. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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21. An Updated Comparison of Current Impression Techniques Regarding Time, Comfort, Anxiety, and Preference: A Randomized Crossover Trial
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Hakan Yılmaz, Fatma Aslı Konca, and Merve Nur Aydın
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intraoral scanner ,dental impression ,patient comfort ,dental anxiety ,clinical efficiency ,Dentistry ,RK1-715 - Abstract
Objective: To compare digital and conventional impressions in terms of impression time, and comfort, anxiety, and preference of the patients.Methods: Digital scans (Trios 3 Cart) and conventional impressions (irreversible hydrocolloid material, hand-mixed) were randomly performed on 39 patients by a single experienced operator at 14-21-day intervals (crossover design). The impression time, comfort score with the visual analog scale, anxiety level with the State-Trait Anxiety Inventory, and preference with a questionnaire, were recorded. The 2 techniques were compared with the independent t-test in terms of time, comfort, and anxiety. Patient–operator assessment and time–comfort relationship were analyzed using Pearson’s correlation test.Results: No statistical difference was found between the 2 impression techniques in terms of time (P = .231). Both the operators’ and patients’ comfort scores showed that the digital technique was found to be more comfortable (P < .001). There was no statistical difference between the 2 techniques with regard to anxiety (P = .668). The patients’ and operators’ comfort scores showed a strong correlation (P < .001), but no correlation was found between comfort and time (P > .05).Conclusion: Digital scanning and conventional dental impression were similar in terms of impression time and anxiety of patients. However, patients were more satisfied with the digital technique, and preferred it.
- Published
- 2021
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22. A Review on Risk Management of Coronavirus Disease 19 (COVID-19) Infection in Dental Practice: Focus on Prosthodontics and All-Ceramic Materials.
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Sorrentino, Roberto, Basilicata, Michele, Ruggiero, Gennaro, Mauro, Maria Irene Di, Leone, Renato, Bollero, Patrizio, and Zarone, Fernando
- Subjects
ONLINE information services ,COVID-19 ,MEDICAL information storage & retrieval systems ,EVIDENCE-based dentistry ,SYSTEMATIC reviews ,DENTAL materials ,DENTAL impressions ,DENTAL metallurgy ,RISK management in business ,PROSTHODONTICS ,MEDLINE - Abstract
Background: A novel β-coronavirus infection (COVID-19) was first detected in Wuhan city, spreading rapidly to other countries and leading to a pandemic. Dental professionals and patients are exposed to a high risk of COVID-19 infection, particularly in the prosthodontic practice, because of the bio-aerosol produced during teeth preparation with dental handpieces and the strict contact with oral fluids during impression making. This paper aimed to provide an overview to limit the risk of transmission of COVID-19 infections during prosthetic procedures in dental offices. Methods: An electronic search was conducted on the electronic databases of PubMed/Medline, Google Scholar, Embase, Scopus, Dynamed, and Open Grey with the following queries: (COVID-19) AND/OR (SARS-CoV-2) AND/OR (Coronavirus) AND/OR (contaminated surface) AND/OR (cross-infection) AND/OR (Prosthodontics) AND/OR (dental ceramic) AND/OR (glass-ceramic). A manual search was performed as well. Results: From the 1023 collected records, 32 papers were included. Conclusions: Dental offices are at high risk of spreading SARS-CoV-2 infection due to the close contact with patients and continuous exposure to saliva during dental procedures. Therefore, pre-check triages via telephone, decontamination, the disinfection of impressions, the sterilization of scanner tips, and the use of specific personal protective equipment, dental high-speed handpieces with dedicated anti-retraction valves, and effective mouthwashes are strongly recommended. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
23. Dişsiz Alan Geometrisinin İmplant Üstü Dijital Ölçü Doğruluğuna Etkisinin Değerlendirilmesi: Kontrollü Deneysel Araştırma .
- Author
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ALPKILIÇ, Dilara Şeyma
- Subjects
ONE-way analysis of variance ,ROOT-mean-squares ,COMPUTER software ,SCANNING systems ,STATISTICAL significance - Abstract
Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
24. A Comparison Between Conventional and Digital Dental Impression Techniques: A Review Article.
- Author
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Saleh, Alalshehi and Mathew, Merin
- Subjects
- *
DENTAL impressions , *PATIENT compliance , *INTERNET searching , *DATABASE searching , *DIGITAL technology - Abstract
A precise dental impression plays a crucial role in achieving definitive prosthesis. The success of conventional impression procedures demands various factors including apt tray and materials, flawless manipulation procedures and patient cooperation. A digital impression procedure is an advanced technique to get rid of the troublesome associated with traditional impression procedures. However, the practicability and accuracy of digital technology can be perceived by comparing all aspects of both conventional and digital impression procedures. This review is aimed to compare various facets of conventional and digital dental impression procedures. A comprehensive literature search has been conducted from published articles using internet search databases and with keywords. From the archived articles, 25 most relevant articles selected for comparative study. The results support the use of digital technology for accurate impression. However, the need for expensive equipment with trained personnel in operating the new software systems for digital technique diminishes its popularity among dental professionals. Thus more advancement is expected in secure handling and maintenance techniques to shift from conventional to digital impression procedures. [ABSTRACT FROM AUTHOR]
- Published
- 2022
25. Effect of multiple pouring on the accuracy of casts made using 3D-printed custom trays with different spacer thicknesses: A research study
- Author
-
Sara Tavakolizadeh, MohammadJavad Razaghi, Pedram Pakravan, Majid Sedaghat Monfared, Elaheh Beyabanaki, and Rahab Ghoveizi
- Subjects
computer-aided design ,dental impression ,three-dimensional printing ,Dentistry ,RK1-715 - Abstract
Background. This study aimed to evaluate the effect of different pouring times and spacer thicknesses on the three-dimensional accuracy of casts made of 3D-printed custom trays. Methods. A partial edentulous maxillary model was scanned for fabricating custom acrylic trays. Twenty custom trays were created using a CAD/CAM system and divided into two groups in terms of their spacer thicknesses (2 mm and 4 mm). All the trays were designed with 2-mm thickness, multiple retentive holes measuring 2 mm in diameter, and three interior seating stops (two on the edentulous ridge and one on the incisal edge of the central incisors). Impressions were made using monophasic polyvinyl siloxane and poured in two different times (one hour and 24 hours after removal) with type IV dental stone. All the casts were scanned to measure three distances (inter-buccal cusps, inter-palatal cusps, and inter-fossa distances) between the two first premolars. The data were analyzed with two-way ANOVA and Bonferroni test at a significance level of 0.05. Results. There was no significant difference between the 3D accuracy of casts made using two different spacer thicknesses poured at 1-hour and 24-hour intervals. However, there was a difference between casts made after 1 hour and 24 hours when using custom trays with 2 mm of spacer thickness in terms of inter-buccal distance. Conclusion. There was no significant difference between the accuracy of casts made using custom trays with either 2 or 4 mm of spacer thickness, which were poured 1 hour or 24 hours after tray removal.
- Published
- 2020
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- View/download PDF
26. The Efficacy of Three Types of Disinfectants on the Microbial Flora from the Surface of Impression Materials Used in Dentistry—In Vitro Study
- Author
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Diana Cerghizan, Kinga Mária Jánosi, Cristina Nicoleta Ciurea, Oana Popelea, Monica Dora Baloș, Adriana Elena Crăciun, Liana Georgiana Hănțoiu, and Aurița Ioana Albu
- Subjects
infection prevention ,cross-infection ,disinfectants ,dental impression ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
During impressions, bacteria, viruses, and fungi remain on the impression material, representing a significant risk for the medical team (dentists, dental assistants, and laboratory technicians). Impression disinfectants have been introduced into dentistry to reduce the risk of cross-infection. This study was performed by examining the surface disinfection of five commonly used impression materials in prosthodontics: alginate-Tropicalgin (Zhermack®), condensation silicone-Zetaplus (Zhermack®), Oranwash L (Zhermack®); and addition silicone-Elite HD + Putty Soft (Zhermack®), Elite + Light Body (Zhermack®) after the disinfection with three disinfectants: Zeta 3 Soft (Zhermack®), Zeta 7 Spray (Zhermack®) and Zeta 7 Solution (Zhermack®). Before disinfection, the impression materials were contaminated with Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, and Candida albicans ATCC 10213. Our results demonstrate the efficacy of the two examined specific disinfectants in reducing cross-infection risk. The surface disinfectant-spray is not adequate for impression disinfection. A high number of bacterial colonies were found on the surface of all impressions disinfected with this spray. The immersion-disinfection method effectively eliminates the risk of cross-infections (Kruskal–Wallis test showed a p < 0.001).
- Published
- 2023
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27. Simulation-based scanning of a structured light system for objects without overhangs.
- Author
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Ham, Won K. and Park, Sangchul
- Subjects
SCANNING systems ,COMPUTER simulation ,STRUCTURED light (Robotics) ,THREE-dimensional modeling ,VIRTUAL reality ,ITERATIVE methods (Mathematics) ,DENTAL impressions ,MATHEMATICAL optimization - Abstract
This paper proposes an automated scanning process of a structured light system for objects without overhangs. The processes for scanning those objects need to plan scanning directions that minimise the missing area on a three-dimensional surface during the scanning process. Thus, the processes require an approach that finds the next scanning direction efficiently in terms of computational costs. This paper develops a scanning simulation approach to meet this requirement. In order to apply the developed approach, the proposed process generates asolution spacefor candidate-scanning directions, and represents an intermediate 3D model. The developed approach traverses the solution space in a virtual environment and executes virtual scanning for the intermediate 3D model. The virtual scanning result of each candidate-scanning direction is analysed in order to evaluate the contribution for filling missing area. The proposed process defines key scanning directions in the solution space through the iterative execution of the developed approach. The proposed process has been implemented, and applied to the scanning experiments of dental impressions. [ABSTRACT FROM PUBLISHER]
- Published
- 2016
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- View/download PDF
28. An Updated Comparison of Current Impression Techniques Regarding Time, Comfort, Anxiety, and Preference: A Randomized Crossover Trial.
- Author
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Yılmaz, Hakan, Konca, Fatma Aslı, and Aydın, Merve Nur
- Subjects
FEAR of dentists ,DENTAL impressions ,DIGITAL technology ,T-test (Statistics) ,RANDOMIZED controlled trials - Abstract
Objective: To compare digital and conventional impressions in terms of impression time, and comfort, anxiety, and preference of the patients. Methods: Digital scans (Trios 3 Cart) and conventional impressions (irreversible hydrocolloid material, hand-mixed) were randomly performed on 39 patients by a single experienced operator at 14-21-day intervals (crossover design). The impression time, comfort score with the visual analog scale, anxiety level with the State-Trait Anxiety Inventory, and preference with a questionnaire, were recorded. The 2 techniques were compared with the independent t-test in terms of time, comfort, and anxiety. Patient-operator assessment and time-comfort relationship were analyzed using Pearson's correlation test. Results: No statistical difference was found between the 2 impression techniques in terms of time (P = .231). Both the operators' and patients' comfort scores showed that the digital technique was found to be more comfortable (P < .001). There was no statistical difference between the 2 techniques with regard to anxiety (P = .668). The patients' and operators' comfort scores showed a strong correlation (P < .001), but no correlation was found between comfort and time (P > .05). Conclusion: Digital scanning and conventional dental impression were similar in terms of impression time and anxiety of patients. However, patients were more satisfied with the digital technique, and preferred it. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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29. Digital prosthetic workflow during COVID‐19 pandemic to limit infection risk in dental practice.
- Author
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Papi, Piero, Di Murro, Bianca, Penna, Diego, and Pompa, Giorgio
- Subjects
- *
PROFESSIONAL practice , *COMPUTER-aided design , *DENTURES , *PREVENTION of communicable diseases , *WORKFLOW , *DENTISTRY , *COVID-19 pandemic - Abstract
The article offers information on digital prosthetic workflow during COVID-19 pandemic to limit infection risk in dental practice. Topics include the health professionals are extremely exposed to COVID-19 infection with dental health professionals, and the risk due to the close contact with patients and the exposure to biological fluids and aerosol/droplets production during dental procedures.
- Published
- 2021
- Full Text
- View/download PDF
30. Antibacterial effects of barium titanate reinforced polyvinyl-siloxane scaffolds.
- Author
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Marin, Elia, Boschetto, Francesco, Sunthar, Thefye P. M., Zanocco, Matteo, Ohgitani, Eriko, Zhu, Wenliang, and Pezzotti, Giuseppe
- Subjects
- *
DENTAL impression materials , *GLOW discharges , *HIGH-frequency discharges , *BARIUM titanate , *CERAMIC powders , *DENTAL materials , *SILOXANES - Abstract
Polyvinyl-siloxane (PVS) is a modified condensation silicon that has found applications in the field of dental impression materials thanks to its high biocompatibility and the ability to be modeled on solid surfaces with a micrometric resolution. Major concerns have been raised on the possibility to sterilize PVS without distorting its geometrical shape, as immersion in antibacterial solutions often results in swelling. As a possible alternative, both radiofrequency glow discharge and UV sterilization have been successfully applied. In this paper, we focus on the possible use of a cheap, bio-compatible ceramic reinforcement powder (BaTiO3) to obtain a higher resistance to colonization and contribute to the prevention of bacterial infections, not only for temporary applications but also long-term. We also use a vacuum treatment to transform the composite polymer into soft scaffolds with relative densities between 35 and 65%) with similar biological properties. Testing with fractions of ceramic reinforcement up to 25% has clearly shown a beneficial effect in terms of bacteria viability against Staphylococcus epidermidis, with potential for future applications as soft biomedical scaffolds, medical clothing, sanitary materials, and filters for the sterilization of air and water. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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31. بررسي تاثير متوكلوپراميد بر كاهش رفلكس تهوع ناشي از قالبگيري
- Author
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دكتر فريبا بلوچ, يوسف فرهمندنيا, and پانته آ رياحي
- Subjects
CLINICAL trials ,DENTAL impressions ,NAUSEA ,PROSTHODONTICS ,DATA analysis ,TREATMENT effectiveness ,PRE-tests & post-tests ,DATA analysis software ,DESCRIPTIVE statistics ,METOCLOPRAMIDE ,PHARMACODYNAMICS - Abstract
Background and aim: Nausea reflex during impression-taking is a concern that decreases the patient's ability to accept dental procedures. There are several methods for elimination of nausea reflex, Prescription of Metoclopramide is one of these pharmaceutical methods. The aim of this study is to evaluate effect of Metoclopramide on the elimination of nausea reflex during impression-taking in patients referring to Prosthodontics Department of the Faculty of Dentistry Tehran Medical Sciences, Islamic Azad University in 2018-19. Materials and Methods: This research is a clinical trial study (before and after study) which was performed on patients referring to fix Prosthodontics department, faculty of Dentistry. Patients should have no medical problem, without any history of drug or any other type of allergy. Only patients with a nausea reflex VAS benchmark over 5, were included in this study. The patients were asked not to eat since 3 hours before impression-taking. Then the nausea reflex intensity before pharmaceutical treatment recorded. Afterwards, 1 ml (25 drops) of Metoclopramide hydrochloride along with 1 mg of sodium saccharin (as a sweetener) was prescribed. After half an hour, the intensity of the nausea reflex was measured again by the same VAS system, and the amount of change in the nausea reflex intensity was investigated by McNemar's statistical test in SPSS V25 software. Results: The study was performed on 28 eligible individuals, 46.4% male and 53.7% women, and 25-56 years old, all of whom had a nausea reflex VAS of more than 5, while after using Metoclopramide, all patients (100%) reported nausea reflex score of 5 or less (P <0.0001). The reflex intensity before and after pharmaceutical treatment was 9/7 ± 3/3 and 3.1± 1.4, respectively. Conclusion: It seems that prescription of Metoclopramide can eliminate nausea reflex intensity during impression-taking in dental patients. [ABSTRACT FROM AUTHOR]
- Published
- 2020
32. Effect of the Different Disinfectants on the Microbial Contamination of Alginate Impression Materials.
- Author
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Ahmed, Haider M. A., Jawad, Rawof Rasheed, and Nahidh, Mohammed
- Subjects
DISINFECTION & disinfectants ,MICROBIAL contamination ,ALGINIC acid ,DRINKING water ,DENTAL impressions ,DENTAL arch ,ALCOHOL - Abstract
Objectives: This study aimed to evaluate the efficacy of different solutions used to disinfect Alginate impression material. Materials and Method: Twenty Alginate impressions for the maxillary arch of five patients recently completed their treatment (four impressions for each patients) were taken swabbed before and after disinfecting them with Chlorhexidine, Desident CaviCide and Alcohol and one just washed with tap water as a control. Swabs were cultured to detect bacteria and fungi and count them. Results: Only Streptococcus bacteria were detected with no fungal contamination. Tap water reduced the bacterial count while other disinfectants killed the bacteria completely. Conclusions: Chlorhexidine, Desident CaviCide and Alcohol can be used to disinfect the dental impression effectively. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
33. Effect of multiple pouring on the accuracy of casts made using 3D-printed custom trays with different spacer thicknesses: A research study.
- Author
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Tavakolizadeh, Sara, Razaghi, Mohammad Javad, Pakravan, Pedram, Monfared, Majid Sedaghat, Beyabanaki, Elaheh, and Ghoveizi, Rahab
- Subjects
TRAYS ,TWO-way analysis of variance ,STATISTICAL hypothesis testing ,THREE-dimensional printing ,INCISORS - Abstract
Background. This study aimed to evaluate the effect of different pouring times and spacer thicknesses on the three-dimensional accuracy of casts made of 3D-printed custom trays. Methods. A partial edentulous maxillary model was scanned for fabricating custom acrylic trays. Twenty custom trays were created using a CAD/CAM system and divided into two groups in terms of their spacer thicknesses (2 mm and 4 mm). All the trays were designed with 2-mm thickness, multiple retentive holes measuring 2 mm in diameter, and three interior seating stops (two on the edentulous ridge and one on the incisal edge of the central incisors). Impressions were made using monophasic polyvinyl siloxane and poured in two different times (one hour and 24 hours after removal) with type IV dental stone. All the casts were scanned to measure three distances (inter-buccal cusps, inter-palatal cusps, and inter-fossa distances) between the two first premolars. The data were analyzed with two-way ANOVA and Bonferroni test at a significance level of 0.05. Results. There was no significant difference between the 3D accuracy of casts made using two different spacer thicknesses poured at 1-hour and 24-hour intervals. However, there was a difference between casts made after 1 hour and 24 hours when using custom trays with 2 mm of spacer thickness in terms of inter-buccal distance. Conclusion. There was no significant difference between the accuracy of casts made using custom trays with either 2 or 4 mm of spacer thickness, which were poured 1 hour or 24 hours after tray removal. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
34. Fast and Accurate 3D Reconstruction of Dental Models
- Author
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Jang, Seongje, Hahm, Yonghee, Lee, Kunwoo, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Bebis, George, editor, Boyle, Richard, editor, Parvin, Bahram, editor, Koracin, Darko, editor, Porikli, Fatih, editor, Skaff, Sandra, editor, Entezari, Alireza, editor, Min, Jianyuan, editor, Iwai, Daisuke, editor, Sadagic, Amela, editor, Scheidegger, Carlos, editor, and Isenberg, Tobias, editor
- Published
- 2016
- Full Text
- View/download PDF
35. Conservative treatment of a unicystic ameloblastoma by marsupialization with a favorable response: A case report and review of the literature
- Author
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Demir, E., Gunhan, O., Demir, E., and Gunhan, O.
- Abstract
Ameloblastoma is a benign tumor of odontogenic epithelium which is slow growing, locally invasive, expansive that may result with asymmetries of the face. Conservative treatment of odontogenic tumors with marsupialization is not common but can be done successfully in those with cystic pattern. The aim of this case and literature review is to propose marsupialization as an initial procedure for its treatment. We have presented a case of an ameloblastoma involving 56-year-old male patient. Orthopantomography and computed tomography showed the lesion extended between the right molar region and left molar region of mandible with both buccal and lingual expansion and root resorptions. On clinical examination, expansions of mandible and slight tooth mobilities were seen. An incisional biopsy was carried out and histopathologic examination revealed ameloblastoma although clinical features of lesion were more suggestive of cyst. Our case was treated by obturator marsupialization with a good healing. This case and review of the literature discusses the available treatment option according to macroscopic features of jaw lesions and emphasizes on the importance of the most conservative treatment option. Conservative treatment preserves integrity of bones while radical treatment can leave major cosmetic and functional sequelae such as pathologic fractures, complication with reconstruction plates. © 2023 Wolters Kluwer Medknow Publications. All rights reserved.
- Published
- 2023
36. Conservative treatment of a unicystic ameloblastoma by marsupialization with a favorable response: A case report and review of the literature
- Author
-
Gunhan, O., Demir, E., Gunhan, O., and Demir, E.
- Abstract
Ameloblastoma is a benign tumor of odontogenic epithelium which is slow growing, locally invasive, expansive that may result with asymmetries of the face. Conservative treatment of odontogenic tumors with marsupialization is not common but can be done successfully in those with cystic pattern. The aim of this case and literature review is to propose marsupialization as an initial procedure for its treatment. We have presented a case of an ameloblastoma involving 56-year-old male patient. Orthopantomography and computed tomography showed the lesion extended between the right molar region and left molar region of mandible with both buccal and lingual expansion and root resorptions. On clinical examination, expansions of mandible and slight tooth mobilities were seen. An incisional biopsy was carried out and histopathologic examination revealed ameloblastoma although clinical features of lesion were more suggestive of cyst. Our case was treated by obturator marsupialization with a good healing. This case and review of the literature discusses the available treatment option according to macroscopic features of jaw lesions and emphasizes on the importance of the most conservative treatment option. Conservative treatment preserves integrity of bones while radical treatment can leave major cosmetic and functional sequelae such as pathologic fractures, complication with reconstruction plates. © 2023 Wolters Kluwer Medknow Publications. All rights reserved.
- Published
- 2023
37. Stavovi studenata dentalne medicine o otisnim postupcima
- Author
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Jović, Veronika and Kranjčić, Josip
- Subjects
attitudes ,BIOMEDICINE AND HEALTHCARE. Dental Medicine. Prosthetic Dentistry ,BIOMEDICINA I ZDRAVSTVO. Dentalna medicina. Protetika dentalne medicine ,dental students ,digitalna tehnika ,conventional technique ,studenti stomatologije ,digital technique ,dental impression ,otisak ,konvencionalna tehnika ,tehnike uzimanja otisaka ,dental impression technique ,stavovi - Abstract
U ovo istraživanje nastojalo se uključiti što veći broj ispitanika kako bi rezultati mogli poslužiti kao dobar pokazatelj stavova studenata dentalne medicine prema korištenju digitalnih tehnologija u struci. U istraživanje je uključeno 199 ispitanika i podijeljeni su s obzirom na spol (44 muška; 22,1%, 155 ženskih; 77,9%), razinu edukacije (64 pretkliničke – 32,2%, 135 kliničke nastave – 67,8%) i mjesto studiranja (141 Stomatološki fakultet Sveučilišta u Zagrebu – 70,9%, 58 MEFST , Dentalna medicina – 29,1%). Ispitanici su većinom bili bolje upućeni u konvencionalnu tehniku otiskivanja, a o digitalnoj su se izjasnili kao ni upućeni ni neupućeni. Digitalnu tehniku otiskivanja percipiraju kao lakšu od konvencionalne. Kao najveću prednost digitalnog skeniranja ističu kraće vrijeme potrebno za uzimanje otiska (p
- Published
- 2023
38. Digitized dentistry: Technology that peaked up the professionality of dental practitioners
- Author
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Farouk M Sakr, Kais G Al Obaidy, Mansour Q Assery, Jamal A Alsanea, and Abdul Nasser I Adam
- Subjects
Computer-aided design/computer-aided manufacturing ,dental impression ,dental practice ,digitized dentistry ,prosthodontics ,Dentistry ,RK1-715 - Abstract
Computer-aided facilities have been realized to improve medical diagnosis and consequent treatment in terms of precision, cost-effectiveness, and shorten the procedures time. A variety of dental restorative aspects including diagnosis, rehabilitation, and maintaining of patients with complex clinical conditions have been dramatically improved through the nowadays employed digitized techniques compared with conventional procedures. This review overviews the ways of how digitization could improve dentally related aspects and to discuss the educational procedures needed to acquire such an approach in dental practice. An electronic search was conducted using specifically related keywords. The relevant and most appropriate articles for systematic reviews were selected.
- Published
- 2017
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39. Digital Impressions Versus Conventional Impressions in Prosthodontics: A Systematic Review.
- Author
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Ahmed S, Hawsah A, Rustom R, Alamri A, Althomairy S, Alenezi M, Shaker S, Alrawsaa F, Althumairy A, and Alteraigi A
- Abstract
The accuracy of definitive impressions has a significant impact on the quality of the final prosthesis. Elastic impression materials are commonly used in the traditional approach to replicate anatomical structures while indirectly fabricating prostheses. Digital impression has gained increasing popularity due to its various advantages, including three-dimensional previsualization, cost-effectiveness, and reduced time consumption. The objective of this study is to evaluate existing studies to provide an overview of the comparative advantages of digital impression techniques over conventional techniques. The review will focus on evaluating the accuracy, patient acceptability, operator preference, and time effectiveness of digital impression techniques in comparison to conventional techniques. The Population, Intervention, Comparison, and Outcome framework served as the basis for this study's search strategy. We conducted a comprehensive literature review by electronically searching articles published between 2000 and 2023 in PubMed, Medline, Cochrane, and the Web of Science. Furthermore, additional manual searches were conducted. The study examined the differences between optical impressions and traditional impressions in terms of accuracy, patient outcomes, and operator outcomes. It included both clinical and preclinical studies as well as randomized controlled trials. In conclusion, this review provides a short summary indicating that digital impressions exhibit comparable accuracy to conventional impressions without any statistically significant difference. This conclusion is based on an evaluation of accuracy, patient preference, and operator preference., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2024, Ahmed et al.)
- Published
- 2024
- Full Text
- View/download PDF
40. THE DENTAL IMPRESSION IN FIXED PROSTHETICS. PRESENT AND FUTURE TRENDS.
- Author
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Moldoveanu, Lucia Elena
- Subjects
- *
DENTAL impressions , *PROSTHETICS , *DENTAL technicians , *DENTAL care , *DENTAL impression materials - Abstract
The dental impression plays a very important role during the clinical and technical stages of prosthetic restoration. Impressing the prosthetic field can cause errors in producing the prosthetic item. The dental impression represents the negative copy of the prosthetic field that will generate the positive copy, respectively the working model/cast. If the assessor, the dentist and / or the dental technician, cannot notice these errors in a timely manner, the prosthetic piece is intended for failure. The objectives of this paper are to review the past, present and future of the dental impression in fixed prosthetics, and also to highlight and analyze possible errors, as well as how to generate and avoid them. There will be discussed how to choose the right tools, the dental impression technique, and the ways to prepare impression materials, exemplified by clinical cases. The methods of impression assessment in fixed prosthesis will take into account all clinical features found within the technical reference. The conclusions of the impression assessment can systematize the main stages of a correct dental impression to practitioners, so as to avoid errors during the imprinting step. The goal of any dentist is to get a correct, precise impression with no possibilities of interpreting the working model by the dental technician, so that the patient has the comfort of his own teeth modeled by a fixed prosthetic work. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
41. Awareness of safety/infection control practices followed by dental laboratory technicians in South India.
- Author
-
Jain, Prerna and Ganapathy, Dhanraj
- Subjects
- *
DENTAL technicians , *INFECTION prevention , *DENTAL care , *HEPATITIS A , *HIV - Abstract
Introduction: Dental impressions are among the items that are considered potentially infectious. They are invariably contaminated with patient saliva or blood. Such fluids can contain viral and bacterial pathogens including human immunodeficiency virus and hepatitis A, B, and C viruses. Materials and Methods: This prospective study was done among dental technicians in and around Tamil Nadu. A cross-sectional study was conducted based on a questionnaire containing 18 questions about the knowledge, precautions, and awareness of impressions disinfection procedures. A total of 65 (50 males and 15 females) technicians participated in the study. Results: This study conveyed that 32 technicians have 0–5 years of experience, 19 of 5–10 years, and about 14 of them gained more than 10 years. Among them, 77% usually wash their impressions once they received it, while others do not. Conclusion: As we know that even small amount of negligence can lead to accidents, the technicians need to be guided and create awareness of various safety precautions to be followed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
42. Awareness on impression disinfection procedures among dental students.
- Author
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Kothari, Shreya, Nittla, Preetham Prasad, and Dhanraj, M.
- Subjects
- *
DENTAL students , *DENTAL impressions , *HEPATITIS A , *BODY fluids , *HIV , *AWARENESS - Abstract
Introduction: Dental impressions are contaminated with patients saliva or blood. Such fluids can contain viral and bacterial pathogens, including HIV and hepatitis A, B, and C viruses. Although most infectious agents do not survive for extended periods outside the body, many pathogens, if present in high enough numbers, can survive several days in protein-containing body fluids. Materials and Methods: An online survey was conducted among the dental students of Chennai through survey planet. It consisted of 18 questions related to impression disinfection procedures, duration and their knowledge and awareness reading these. The respective responses were statistically analyzed. Results: With 80 responses totally, 72% of the people were aware that impressions are infectious. About 71% preferred alginate impressions over silicone and the majority chose to immerse the impression rather than spray with disinfectant. About 79% told that communication between technician and practitioner is very important. Conclusion: With efficient communication and proper protocols in a regular manner will not spread any kind of infection. This will keep the environment free of microbes and also prevent the spread of infections to patients and technicians. [ABSTRACT FROM AUTHOR]
- Published
- 2019
43. Accuracy of Casts Fabricated by Digital and Conventional Implant Impressions.
- Author
-
Bohner, Lauren, Hanisch, Marcel, De Luca Canto, Graziela, Mukai, Eduardo, Sesma, Newton, and Neto, Pedro Tortamano
- Subjects
DENTAL implants ,DENTAL casting ,EPOXY resins ,LENGTH measurement ,ACCURACY - Abstract
The purpose of this study was to compare the accuracy of stereolithographic casts (SCs) with those obtained using conventional implant impressions. An epoxy resin model containing dental implants was used as master model. Dental casts (n = 10) were fabricated through both conventional and digital implant impressions. The conventional casts (CCs), SCs, and the master model were digitized, and the accuracy was determined through a deviation analysis and linear measurements. Data were analyzed using paired Student t test with P <.05. The SCs showed higher deviation at the vestibular area (CC: 41 ± 28.87 μm; SC: 117 ± 36.83 μm) and lingual cusps (CC: 40.70 ± 19.79 μm; SC: 80 ± 42.95 μm) in comparison with CCs. No statistically significant difference was found for linear measurements of conventional and digital casts. The entire-arch accuracy was comparable between casts. However, SCs were less accurate at the cusp level in comparison with CCs. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
44. Evaluation of the Accuracy of Conventional and Digital Impression Techniques for Implant Restorations.
- Author
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Moura, Renata Vasconcellos, Kojima, Alberto Noriyuki, Saraceni, Cintia Helena Coury, Bassolli, Lucas, Balducci, Ivan, Özcan, Mutlu, and Mesquita, Alfredo Mikail Melo
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KRUSKAL-Wallis Test ,METALS in surgery ,ACCURACY ,STATISTICS ,MAXILLA - Abstract
Purpose: The increased use of CAD systems can generate doubt about the accuracy of digital impressions for angulated implants. The aim of this study was to evaluate the accuracy of different impression techniques, two conventional and one digital, for implants with and without angulation. Materials and Methods: We used a polyurethane cast that simulates the human maxilla according to ASTM F1839, and 6 tapered implants were installed with external hexagonal connections to simulate tooth positions 17, 15, 12, 23, 25, and 27. Implants 17 and 23 were placed with 15° of mesial angulation and distal angulation, respectively. Mini cone abutments were installed on these implants with a metal strap 1 mm in height. Conventional and digital impression procedures were performed on the maxillary master cast, and the implants were separated into 6 groups based on the technique used and measurement type: G1 – control, G2 – digital impression, G3 – conventional impression with an open tray, G4 – conventional impression with a closed tray, G5 – conventional impression with an open tray and a digital impression, and G6 – conventional impression with a closed tray and a digital impression. A statistical analysis was performed using two‐way repeated measures ANOVA to compare the groups, and a Kruskal‐Wallis test was conducted to analyze the accuracy of the techniques. Results: No significant difference in the accuracy of the techniques was observed between the groups. Therefore, no differences were found among the conventional impression and the combination of conventional and digital impressions, and the angulation of the implants did not affect the accuracy of the techniques. Conclusions: All of the techniques exhibited trueness and had acceptable precision. The variation of the angle of the implants did not affect the accuracy of the techniques. [ABSTRACT FROM AUTHOR]
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- 2019
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45. Comprehensive Review and Comparison of the Disinfection Techniques Currently Available in the Literature.
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Chidambaranathan, Ahila S. and Balasubramanium, Muthukumar
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DENTAL offices ,DENTAL facilities ,CROSS infection prevention ,DENTAL impressions ,DENTAL care ,DRINKING water ,DENTAL materials ,INFECTION prevention - Abstract
The goal of disinfection in the dental office is to prevent the spread of infection from one patient to another and maintain the safety of the dental care providers. Prevention of cross infection has significant effect on infection control. The standard procedure of rinsing impressions under tap water immediately after removal from the mouth eliminates microorganisms along with saliva and blood. A broad search on published literature was done using the keywords impression materials, disinfection method, and sterilization of dental impression from 1980 to 2016 in Medline, Google Scholar, the internet, and textbooks. This article critically analyzes the various published methods of dental impression disinfection in dentistry. [ABSTRACT FROM AUTHOR]
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- 2019
- Full Text
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46. High-resolution MR imaging for dental impressions: a feasibility study.
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Boldt, Julian, Rottner, Kurt, Schmitter, Marc, Hopfgartner, Andreas, Jakob, Peter, Richter, Ernst-Jürgen, and Tymofiyeva, Olga
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- *
MAGNETIC resonance imaging , *DENTAL care , *TEMPOROMANDIBULAR joint , *TEETH , *DENTAL fillings - Abstract
Objectives: Magnetic resonance imaging is an emerging technology in dental medicine. While low-resolution MRI has especially provided means to examine the temporomandibular joint due to its anatomic inaccessibility, it was the goal of this study to assess whether high-resolution MRI is capable of delivering a dataset sufficiently precise enough to serve as digital impression of human teeth.Materials and methods: An informed and consenting patient in need of dental restoration with fixed partial dentures was chosen as subject. Two prepared teeth were measured using MRI and the dataset subjected to mathematical processing before Fourier transformation. After reconstruction, a 3D file was generated which was fed into an existing industry standard CAD/CAM process.Results: A framework for a fixed dental prosthesis was digitally modeled and manufactured by laser-sintering. The fit in situ was found to be acceptable by current clinical standards, which allowed permanent placement of the fixed prosthesis.Conclusions: Using a clinical whole-body MR scanner with the addition of custom add-on hardware, contrast enhancement, and data post-processing, resolution and signal-to-noise ratio were sufficiently achieved to allow fabrication of a dental restoration in an acquisition time comparable to the setting time of common dental impression materials. Furthermore, the measurement was well tolerated.Clinical Relevance: The herein described method can be regarded as proof of principle that MRI is a promising option for digital impressions when fixed partial dentures are required. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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47. General Dentists' Knowledge About Infection Control of Dental Impressions Between Clinic and Laboratory in South Khorasan Province.
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Mostafavi, Azam Sadat, Moghadam, Gholamhossein Motahhary, and Hajiani, Narges
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- *
DENTAL impressions , *INFECTION prevention , *PRACTICE of dentistry - Abstract
Background and Objectives: Dental clinic and laboratory are environments where infectious diseases' transmission occurs easily and prevention of cross infection between these places is a crucial issue in dental practice. The purpose of this study was to evaluate the knowledge of general dentists about infection control of dental impressions between clinic and laboratory in south Khorasan province. Methods: In this cross - sectional study that done in 2014, the knowledge of dentists was assessed through a questionnaire consisting of twenty questions. For any questions a score from zero to two was awarded. For data extraction, scores of responses to each question were added together and the average was presented. For scores more than 34 good knowledge, between 25 and 34 moderate knowledge and less than 25 weak knowledge were reported. Level of dentists' knowledge based on their gender, work experience and university was also assessed. Data were analyzed by statistical software SPSS 16 in which Kruskal -Wallis and Mann - Whitney tests were used. Results: The average knowledge of general dentists about the studied subject was moderate (31.75 - 3.85). There was not a significant difference between the average knowledge of dentists and gender as well as work experience (p > 0.05), but the mean of knowledge based on universities, showed significant differences (p = 0.003). Conclusions: Considering the importance of infection control in dentistry and according the results of this study, a greater emphasis on teaching this topic in undergraduate course and holding continuing education courses for dentists on this field is recommended. [ABSTRACT FROM AUTHOR]
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- 2018
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48. Multimodality Registration in Daily Clinical Practice
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Bale, Reto, Bock, Hans-Georg, editor, de Hoog, Frank, editor, Friedman, Avner, editor, Gupta, Arvind, editor, Neunzert, Helmut, editor, Pulleyblank, William R., editor, Rusten, Torgeir, editor, Santosa, Fadil, editor, Tornberg, Anna-Karin, editor, and Scherzer, Otmar, editor
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- 2006
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49. Attitude and practice of disinfection protocol for different impression materials among practicing dentists in Tamil Nadu - A cross sectional survey
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Lizy Teena A, Surya R, Vidyashree Nandini V, Vaishnavi R, and Manjula G
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Disinfection ,Dental impression ,Dental technician ,Dentist ,Impression - Abstract
Aim: The purpose of this survey was to find the attitude and practice of impression disinfection protocol employed by the practicing dentists in their clinical practice in Tamil Nadu. Materials and Methods: Self-administered validated online website based questionnaires were circulated among dentists practicing in Tamil Nadu. The questions were taken up by dentists who were willing to participate in the survey and a total of 200 responses were recorded. There were two sections to the questionnaire: one included demographic information and the other featured questions regarding the disinfection protocol. The responses were recorded in excel sheet followed by statistical analysis of the data. Results: 97.5% of the dentists routinely rinse the impression with running tap water before sending it to the lab/ prior pouring the cast and 2.5% dentists do not rinse the impressions. 78.9% dentists routinely disinfect the working impressions, whereas 21.1% do not disinfect the working impressions before sending it to the laboratory/ before pouring the casts. 48.2% of the dentists stated that they are unsure whether their lab workers disinfect their preliminary/working impression before pouring casts. 46.9% dentists stated that they do not have disinfection guidelines in their clinic. 81.4% believe that covid-19 spreads by saliva and 73.9% dentists have changed the disinfection protocol for impressions after covid-19. Conclusion: It was found that the majority of respondents rinsed and disinfected the impression with running water and disinfected it on a regular basis for 1-10 minutes. This study also indicates a lack of interaction between the dentists and dental technicians about the information on the disinfection status of the impression sent, as well as a need for increased awareness in order to reduce the disease transmission in dental laboratories. Significant number of dentists have changed their disinfection protocol after covid-19 pandemic.
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- 2022
- Full Text
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50. Esthetic rehabilitation of medially deviated anterior teeth through CAD/CAM fabrication zirconia crowns: A case report
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Mahinay, Ma. Isabel, Arong, Fatima, Clamaña, Geralyn, Parayno, Josh, Godinez, Mika Michael Carl, and Bulagao, Prince Joshua
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design equipment ,crown lengthening ,dental impression ,biocompatible materials ,crown - Abstract
This case report shows how the esthetic rehabilitation of medially deviated anterior dentition with the application of zirconia crowns. The rehabilitation process started with oral examination with an initial impression, then a smile design with gingivectomy to aid the crown lengthening. The following treatment-specific teeth were prepared with an impression to allow temporary restorations to be placed. The findings indicate that the specific material for restoration may have an effective role in the rehabilitation process.
- Published
- 2022
- Full Text
- View/download PDF
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