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Made available in DSpace on 2022-04-29T08:36:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Objectives The aim of this study was to verify during facial expressions (happy, sad, fearful, angry, surprised, and disgusted) if: (1) there would be difference in the electromyography (EMG) of the occipitofrontalis, temporal, masseter, and sternocleidomastoid muscles on the normal side (NS) compared with the affected side (AS) (without the use of an ocular prosthesis) in individuals with unilateral absence of the eyeball, and (2) the rehabilitation with a new ocular prosthesis would affect the EMG of the muscles studied on the AS in these individuals. Materials and Methods Thirteen individuals, without temporomandibular disorder, with good health, with unilateral absence of the eyeball (the eye must have been removed by evisceration or enucleation), and users or nonusers of an ocular prosthesis were included. EMG of the occipitofrontalis, temporal, masseter, and sternocleidomastoid muscles was performed during rest and facial expressions (happy, sad, fearful, angry, surprised, and disgusted) before (T0) and 90 days after (T1) rehabilitation with a new ocular prosthesis. The analyses were performed in T0 on NS and AS (without the use of an ocular prosthesis), and in T1 on AS with the new ocular prosthesis. Statistical Analysis All data were submitted to the Student's t -test with p < 0.05. Results There was no statistically significant difference comparing the AS with the NS in T0 for all muscles studied, during all facial expressions evaluated (p > 0.05). There was no statistically significant difference comparing the AS in T0 with itself in T1 for all muscles studied, during all facial expressions evaluated (p > 0.05). Conclusion Eye loss did not affect the EMG of studied muscles when comparing NS with AS (without the use of an ocular prosthesis). The rehabilitation with ocular prosthesis was not capable of changing the EMG on AS. Department of Dental Materials and Prosthodontics Araçatuba Dental School São Paulo State University, José Bonifácio Street, 1193, Araçatuba Oral Oncology Center School of Dentistry São Paulo State University, Araçatuba Department of Pediatric and Social Dentistry School of Dentistry São Paulo State University, Araçatuba Department of Dental Materials and Prosthodontics Araçatuba Dental School São Paulo State University, José Bonifácio Street, 1193, Araçatuba Oral Oncology Center School of Dentistry São Paulo State University, Araçatuba Department of Pediatric and Social Dentistry School of Dentistry São Paulo State University, Araçatuba

To assess the reproducibility of four different centric relation (CR) recording techniques, and time spent performing each technique in edentulous individuals.Four techniques were assessed: extraoral gothic arch tracing (EOGA), intraoral gothic arch tracing (IOGA), deglutition (D), and frontal manipulation with tongue elevation (FMTE). Twelve subjects participated in the study; four technique records were performed on each volunteer by the same operator. Each record was repeated three times, in the same period of the day, with a 30 min interval between each technique. The reproducibility of each technique was assessed by the tri-dimensional displacement of the position of the condylar housing (mandible condyle) to the wall of the condylar guide (glenoid cavity) in the semi-adjustable articulator (anteroposterior, mediolateral, and superior-inferior). The time spent on each technique was timed in seconds (from the beginning of each technique until the wax occlusion fixation). The analysis of variance and the Tukey test were performed for anteroposterior displacement (two-way) and for time spent on CT recording techniques (one-way) (α0.05). Regarding mediolateral and superior-inferior displacements, the non-parametric Kruskal-Wallis was performed for the comparison between recording methods, while the Mann-Whitney test was performed for the comparison between sides (α0.05).The factor recording technique interfered with the anteroposterior displacement (ANOVA: α0.001; F = 11.396). The technique D (right side: 3.78 ± 0.69 mm; left side: 3.45 ± 0.74 mm) showed a statistically significant difference compared to the other techniques (EOGA: right side: 3.00 ± 0.00 mm; left side: 3.00 ± 0.00 mm; FMTE: right side: 2.81 ± 0.52 mm; left side: 2.82 ± 0.79 mm; IOGA: right side: 2.90 ± 0.65 mm; left side: 3.12 ± 0.44 mm). The time spent on the recording technique influenced the results (ANOVA: α0.001; F = 21.118). The IOGA (340.40 ± 163.41 seconds) and EOGA (285.93 ± 133.84 seconds) required more time compared to the D (86.00 ± 34.33 seconds) and FMTE (101.33 ± 36.72 seconds) techniques.Graphic recordings showed better reproducibility and accuracy of the position of the centric relation. This article is protected by copyright. All rights reserved.

Made available in DSpace on 2021-06-25T10:24:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Purpose: To evaluate changes in oral health-related quality of life (OHRQoL) and associated factors in individuals with acquired brain injury (ABI) during hospitalization. Methods: Forty-six individuals with ABI were examined at week 1 and 5 of hospitalization. OHRQoL was recorded through Oral Health Impact Profile-14 (OHIP-14), clinical oral examinations were conducted, while orofacial health-related ‘motor’ and ‘cognitive’ scores were retrieved from patients’ e-journal. Association between variables were investigated using factor analysis and multilevel regression modeling. Results: There were no significant differences in the OHIP-14 scores between week 1 and 5. Factors analysis revealed two OHIP-14 domains, ‘psychosocial’ and ‘physica‘. Individuals who improved their cognitive skills over study period and those with ‘severe’ periodontitis at baseline had increased scores of OHIP-14 ‘psychosocial’ domain. Individuals who improved orofacial health-related ‘motor’ skills over study period had decreased ‘physical’ domain scores. Increased cognition over study period, current smoking and dental calculus were associated with increased ‘physical’ domain. Conclusions: The OHRQoL was poor both at week 1 and 5. Individual’s cognitive and motor skills as well as their oral health status influenced their OHRQoL. Thus, individual’s awareness and involvement in addition to oral care seem to be imperative in improving the OHRQoL in neurorehabilitation setting. Hammel Neurorehabilitation Centre and University Research Clinic Department of Clinical Medicine Aarhus University Section of Orofacial Pain and Jaw Function Department of Dentistry and Oral Health Aarhus University Section of Periodontology Department of Dentistry and Oral Health Aarhus University Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of Dentistry Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of Dentistry

Made available in DSpace on 2022-04-29T08:32:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-09-01 Background: This study aimed to compare the masticatory efficiency, the maximum voluntary occlusal bite force (MVOBF) and the electrical activity (EMG) of masticatory muscles of practitioners of upper limb bodybuilding before and after physical activity. Methods: Twenty healthy individuals (10 men and 10 women, age from 18 to 30 (mean of 24.7 years old) without masticatory system disorders, that regularly practice hypertrophic physical activity were submitted to the analyses of masticatory efficiency, MVOBF, and surface EMG of the temporalis and masseter muscles. The masticatory efficiency was analyzed by comminution of the artificial material (Optocal®) and a sieving method. The MVOBF was measured by a dynamometer, and EMG was evaluated during resting mandibular position, maximum voluntary clenching (MVC), and MVC with a Parafilm M tape between teeth, and free mastication of chewing gum. The analyses were made before (T0) and immediately after the performance of upper limb bodybuilding exercises (T1). The data of masticatory efficiency and MVOBF were submitted to the Student T-test, and their correlations were analyzed by the Pearson correlation test, and the EMG data were submitted to the 2-way repeated measures ANOVA, all tests with a 5% significance. Results: There was a significant decrease of masticatory efficiency after the training. No statistical difference in the MVOBF and EMG was found, and there was a positive correlation between masticatory efficiency and MVOBF. Conclusions: Therefore, changes were found for masticatory efficiency only, which decreased after hypertrophic exercise. There was a positive correlation between masticatory efficiency and MVOBF Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University-UNESP, Road Jose Bonifacio 1193,Vila Mendonca KM Runner Incentivo Esporte Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University-UNESP, Road Jose Bonifacio 1193,Vila Mendonca

Made available in DSpace on 2022-04-28T19:47:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-03-01 Health Research Fund of Central Denmark Region Objectives: To assess the internal structure and validity of the ‘bedside oral examination’ (BOE) instrument in individuals with acquired brain injury (ABI). Methods: Ninety ABI individuals were examined using BOE in their first week of neurorehabilitation. BOE measures oral health within eight categories including: swallow, tongue, odour, teeth, lips, saliva, mucosa and gingiva. To assess the validity of BOE, full-mouth clinical examination (gold standard) was performed. The internal structure of BOE was assessed using exploratory and confirmatory factor analyses. To measure the validity, the BOE scores were dichotomised into excellent oral health and altered oral health. Sensitivity, specificity and area under the receiver operating characteristic (ROC) curve of the six/eight BOE items were compared with their related clinical oral examination tool. Results: Overall, the patients had poor oral health irrespective of the oral examination tool used. Factor analyses indicated two factors within BOE: ‘oral hygiene’ (teeth, gingiva and mucosa) and ‘orofacial health’ (lips, swallow and saliva). BOE tongue and odour items loaded in neither factor. BOE items showed low validity since the highest area under the ROC curve was 0.60. Findings on the sensitivity value ranged from 35.0 to 74.2, while specificity from 44.4 to 83.3, depending on the item evaluated. Conclusion: Bedside oral examination does not seem to be an ideal ‘single’ outcome tool in a neurorehabilitation setting as it lacks validity. BOE evaluates oral health as two independent but correlated components and treat them separately indicating precision treatment depending on their oral health dysfunction. It is advisable to use BOE as a screening tool. However, it should be complimented by proper clinical examination before establishing a treatment plan for oral health in patients with ABI. Hammel Neurorehabilitation Centre and University Research Clinic Department of Clinical Medicine Aarhus University Section of Orofacial Pain and Jaw Function Department of Dentistry and Oral Health Aarhus University Section for Periodontology Department of Dentistry and Oral Health Aarhus University Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University (UNESP) JSS Dental College and Hospital JSS Academy of Higher Education and Research Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University (UNESP) Health Research Fund of Central Denmark Region: A1407

Made available in DSpace on 2022-04-28T19:46:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 OBJECTIVES: This study aims to assess the impact of social isolation, due to the Covid-19 pandemic, on mental health, Temporomandibular Disorder (TMD) and orofacial pain in men and women. METHODOLOGY: Individuals living in Brazil answered an online questionnaire on their sociodemographic and behavioral aspects, emotional scale (DASS-21), Impact of Event Scale, and Pain Screener in Temporomandibular Disorders (TMD-Pain Screener) during June 2020. Descriptive statistical analyses and logistic and linear regressions were applied (5% significance). RESULTS: Overall, 2301 individuals were included, 89.1% practiced social isolation, 72.6% were employed/studying, at least 15% presented severe or extremely severe levels of emotional distress and presence of powerful (34.1%) and severe impact event (15%). During the outbreak, 53.2% perceived feeling worse and 31.8% reported that orofacial pain started or worsened after the pandemic outbreak. Gender was associated with social class (P=0.036), pain/stiffness in the jaw on awakening (P=0.037), change of pain during jaw habits (P=0.034) and perception of change in the situations mentioned in the TMD-Pain Screener (P=0.020), depression (P=0.012), anxiety (P=0.006) and impact of the event (P=8.3E-11). Social isolation had a lesser chance to change the routine, to be practiced by the unemployed/not studying, and to be practiced by men (all with P

Background. Implant fractures can cause difficult problems for patients and dentists. This systematic review aimed to determine the influence of some implant parameters on the occurrence of their fracture and to determine the incidence of fractures reported in recent years. Methods. A search was conducted in Pubmed database, from which 12 studies published in the last 12 years were selected. Results. This review reported a 2% incidence of implant fracture. Most implants had been in function between 3 and 4 years until fracture. The studies did not provide necessary information to establish a relationship between the different parameters of implants and the incidence of fractures. Conclusion. Thus, the indication of type, diameter and length of an implant and the bone quality in the region receiving it should be studied and accurately examined for each individual case in order to avoid future failures.

PURPOSE To investigate the influence of nonthermal plasma (NTP) treatment on the tensile bond strength between heat-polymerized acrylic resin for ocular prostheses and silicone reliner, with and without the use of an adhesive primer. MATERIALS AND METHODS One-hundred and sixty-four acrylic resin specimens were fabricated and randomly distributed into four groups according to the type of surface treatment: Sofreliner Primer, NTP, Sofreliner Primer + NTP, and NTP + Sofreliner Primer. Two specimens interposed with relining material (Sofreliner) formed one test sample to perform the tensile bond strength tests, before (initial) and after storage (final) in saline solution (37°C, 90 days, n = 10). Surface characterization was performed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The failure type was classified as cohesive, adhesive, or mixed. The data were analyzed statistically using the two-way ANOVA and Tukey test, as well as the chi-squared test (α = 0.05), Bonferroni correction (α = 0.005), and Spearman correlation coefficient (α = 0.05). RESULTS The SEM and EDS analyses showed the presence of a thin, homogenous organic film in the groups treated with NTP. The NTP + Sofreliner Primer group presented the largest bond strength mean values in the initial period (p < 0.05). Sofreliner Primer and NTP + Sofreliner Primer groups presented the first and second largest tensile bond strength mean values in the final period (p < 0.05), respectively. NTP + Sofreliner Primer group also had the largest number of cohesive (70%, initial) and mixed (90%, final) failures. CONCLUSIONS The NTP treatment performed before the primer application enhanced the bond between the acrylic resin ocular prosthesis and the Sofreliner silicone-based reliner, even after 90 days of immersion in saline solution.

The aim of this study was to compare PETG/TPU (polyethylene terephthalate glycol/thermoplastic polyurethane) with PETG (polyethylene terephthalate glycol), based on color stability and microhardness. Sixty circular specimens (10 mm in diameter × 3 mm thick) were fabricated (30 PETG/TPU and 30 PETG). The specimens in both groups were submitted to 2000 thermal cycles in alternating baths of 60 seconds at 5°C ± 1°C and 55°C ± 1°C. The specimens were then divided into subgroups (n = 10) that were disinfected 15 minutes per day for 60 days in 1 of 3 solutions: liquid soap, 2% chlorhexidine, or Listerine. Color change (∆E*) and Knoop microhardness tests were performed at baseline (T0), after thermocycling (T1), and after disinfection (T2). Analysis of variance (ANOVA) and Tukey test were used (P0.05). ANOVA showed that there was no statistically significant difference in color change between the 2 materials after thermocycling (∆E*1) or after disinfection (∆E*2), regardless of the disinfectant. Intragroup comparisons (Listerine, liquid soap, and 2% chlorhexidine) of the 3 PETG/TPU groups or 3 PETG groups after disinfection revealed no statistically significant difference for microhardness. Comparison of PETG/TPU with PETG based on the overall mean microhardness showed that the PETG/TPU had a significantly greater mean surface hardness value (P0.05). The Tukey test revealed statistically significant increases in microhardness at T1 and T2 for PETG/TPU and PETG so that T0T1T2 (P0.05). Both thermoplastic materials demonstrated an increase in hardness after thermocycling and after disinfection, and both showed similar color changes regardless of the disinfection method. Based on the color evaluation, the liquid soap proved to be the best option for disinfection of PETG/TPU and PETG, because the color change (∆E* value) was clinically acceptable for both materials.

Made available in DSpace on 2021-06-25T10:26:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Aims: To investigate whether localized sensitization of the sternocleidomastoid (SCM) muscle using nerve growth factor (NGF) would affect masseter and anterior temporalis muscle sensitivity and pain profiles. Methods: A total of 28 healthy participants attended two sessions (T0 and T1). At T0, the maximum voluntary occlusal bite force (MVOBF), as well as pressure pain thresholds (PPT), mechanical sensitivity, and referred pain/sensations for the SCM, masseter, and temporalis muscles, were assessed. Participants also completed the Pain Catastrophizing Scale (PCS), the Pain Vigilance and Awareness Questionnaire (PVAQ), and the Neck Disability Index (NDI). After these assessments, 14 participants received an injection of NGF into the SCM, and 14 received an injection of isotonic saline solution. At T (48 hours postinjection), the participants were again submitted to the same evaluations. Results: NGF caused significant mechanical sensitization in the SCM (P .208). It also caused significant increases in NDI score (P =.004). No statistically significant differences were found for MVOBF, frequency of referred pain/sensations, or questionnaire scores (P >.248). Conclusion: These results suggest that 48 hours after localized sensitization of the SCM, the primary response is impairment of neck function, but not jaw function. J Oral Facial Pain Headache 2021;35:7–16. doi: 10.11607/ofph.2593 Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University (UNESP) Section of Orofacial Pain and Jaw Function Department of Dentistry Faculty of Health Aarhus University Scandinavian Center for Orofacial Neurosciences (SCON) Department of Dental Medicine Karolinska Institutet Huddinge Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University (UNESP) FAPESP: 2018/00770-4

Made available in DSpace on 2021-06-25T10:20:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Objectives: The purpose of this study was to assess the effects of oral rehabilitation with complete dentures on bite force and electromyography of the suprahyoid and sternocleidomastoid muscles, and their correlation with occlusal vertical dimension (OVD). The research questions were “What are the effects of rehabilitation with complete dentures on bite force and electromyography of suprahyoid and sternocleidomastoid muscles, and how are they correlated with OVD?” Materials and methods: Patients who are wearers of unsatisfactory removable complete dentures were attended in three sessions (T0, T1, and T2). At T0, while the patients still wore the old dentures, they were submitted to bite force and surface electromyographic exams of the suprahyoid and sternocleidomastoid muscles. These exams were repeated, and the OVD was measured while the patients wore their old and new prostheses, 30 days after insertion of the new prosthesis (T1). The exams were repeated 100 days after the insertion of the new prosthesis (T2). The data were submitted to the Shapiro-Wilk normality test, analysis of variance (ANOVA), and Pearson correlation and linear regression, all with 5% significance. Results: Fifteen patients participated in the study. No statistically significant difference was observed for bite force or electromyography in T0, T1, or T2. However, the correlation and regression tests showed important interactions between the OVD and maximum voluntary occlusal bite force, as well as the OVD and electromyography during deglutition for the suprahyoid muscles. Conclusion: Rehabilitation did not impact bite force nor the activity of the assessed muscles (electromyography). On the other hand, OVD was shown to be an important factor for bite force, and deglutition of water after rehabilitation. Clinical relevance: This study shows what are the influences of rehabilitation on oral functions and reinforces the importance of corrected reestablishment of OVD because it has been found to be an important factor for bite force and electromyography during deglutition. Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of Dentistry Department of Support Production and Animal Health São Paulo State University (UNESP) School of Veterinary Medicine Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of Dentistry Department of Support Production and Animal Health São Paulo State University (UNESP) School of Veterinary Medicine

Made available in DSpace on 2022-04-28T19:29:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-10-01 Objective The aim of this study is to evaluate the color alteration and shore A hardness of a medical silicone with extrinsic pigmentation, before and after accelerated aging. Materials and Methods Twenty samples (Silastic Q7-4735) were made with an intrinsic pigmentation. This intrinsic pigmentation was composed of a pink pigment (H-109-P, Factor II) and an opacifier (ZnO). All samples had standardized dimensions (45-mm diameter and 2-mm thickness). Half of the 20 samples manufactured subsequently received an extrinsic pigment (Tan FE-215, Factor II). Therefore, two groups were created (n = 10): Group 1, group with intrinsic pigmentation and without extrinsic pigmentation (control) and Group 2, group with intrinsic and extrinsic pigmentation. Samples were submitted to color and Shore A hardness tests, before and after 1,008 hours of aging. Statistical Analysis Color alteration data were submitted to Student's t -test (a = 0.05). Shore A hardness data were submitted to two-way analysis of variance and Tukey test (a = 0.05). Results The incorporation of the extrinsic pigment on the silicone did not affect its color (?E) when the two groups were compared (p = 0.232). Regarding the hardness test, the interaction between group and period did not interfere with the hardness results(p =0.599). However, the period factor showed that there was a reduction in the hardness of the silicone after aging (p < 0.05). Conclusion In this study, all the hardness and color results of the silicone used were clinically acceptable, regardless of the presence of extrinsic pigmentation. Department of Dental Materials and Prosthodontics São Paulo State University School of Dentistry Department of Pediatric and Social Dentistry São Paulo State University School of Dentistry Department of Dental Materials and Prosthodontics São Paulo State University School of Dentistry Department of Pediatric and Social Dentistry São Paulo State University School of Dentistry

Made available in DSpace on 2020-12-12T02:08:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-05-01 Objective: This study aimed to evaluate the quality of life of patients with oral or oropharyngeal cancer by using specific questionnaires (QLQ-C30 and QLQ-HandN35), varying according to the location of the tumor (oral cavity or oropharynx) and the treatment performed (only surgery or surgery associated with radiotherapy). Methods: Fifty patients were enrolled in this study and answered the EORTC QLQ-C30 and EORTC HandN35 questionnaires, before (baseline), at 1 week, and 3 months after treatment. Internal consistency reliability was calculated with the Cronbach coefficient. The Kruskal-Wallis and Wilcoxon tests were applied and P

Objective. To evaluate the influence of different pigmentations and accelerated aging on the hardness and tear strength of the A-2186 and MDX4-4210 silicones. Materials and Methods. The samples A-2186 and MDX4-4210 were manufactured without and with pigmentations (black, bronze, and pink). For the Shore A hardness test, 80 samples of each silicone were fabricated, and for the tear strength test, 320 samples of each silicone were fabricated. Eight groups were created for each test (n = 10). These tests were performed before and after 252, 504, and 1008 hours of aging. Three-way repeated-measures analysis of variance and the Tukey test were performed (α = 0.05). Results. The A-2186 silicone showed higher hardness and tear strength when compared with the MDX4-4210 silicone p<0.05, except in the hardness of the A-2186 and MDX4-4210 groups without pigmentation after 1008 hours p>0.05. All hardness values were between 25 and 35 units, regardless of the silicone type, period, and pigmentation (or no pigmentation). In most situations, the hardness of silicones used increased after 252 hours p<0.05. The nonpigmented MDX4-4210 group and all A-2186 groups showed an increase in tear strength after 252 hours p<0.05. For the nonpigmented MDX4-4210 group, from 252 to 1008 hours, there was no change in tear strength p>0.05. All pigmented MDX4-4210 groups showed no change in tear strength from 0 (initial) to 1008 hours of aging p>0.05. In all A-2186 groups, from 252 to 504 hours, there was a reduction in tear strength p<0.05, and from 504 to 1008 hours, there was an increase in tear strength p<0.05, except in the bronze A-2186 group p>0.05. Conclusion. In most situations, the A-2186 silicone showed significantly higher values of hardness and tear strength than the MDX4-4210 silicone. All hardness values were considered clinically acceptable. Accelerated aging could increase, decrease, or not significantly change the hardness and tear strength of the silicones used. The results of hardness and tear strength suggest that MDX4-4210 was more influenced by the presence of pigmentation after aging.

Made available in DSpace on 2018-11-26T16:01:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-05-01 Statement of problem. Many elderly individuals are rehabilitated with removable complete dentures, which require an initial adaptation period for both oral perception and the perioral muscles. Studies assessing the changes in stimulus perception and the electromyographic (EMG) activity of the orbicularis oris muscle shortly after conventional complete denture insertion are lacking. Purpose. The purpose of this clinical study was to evaluate the effect of mouth rehabilitation with removable complete dentures on stimulus perception and the EMG activity of the orbicularis oris muscle. Material and methods. This study was approved by the Human Research Ethics Committee of the Aracatuba Dental School (Sao Paulo State University). Fifteen participants who had worn their removable complete dentures for at least 5 years and needed rehabilitation with new prostheses were enrolled in the study. A perception questionnaire was applied, and surface EMG examinations of the orbicularis oris muscle during rest, suction of water with a straw, and pronunciation of the syllables /bah/, /mah/, /pah/, and the word 'Mississippi' were performed before (TO) and 30 (T1) and 100 (T2) days after insertion of the new prostheses. The data were analyzed with the Cochran Q test, McNemar test, 2-way repeated measures ANOVA, and honestly significant difference (HSD) Tukey test (alpha=.05). Results. Significant improvement was reported in the perception questionnaire in terms of the oral discomfort sensation in the T2 period. EMG activity decreased during rest and suction after insertion of the new prostheses. A statistical difference between the upper and lower fascicles of the orbicularis oris muscle was detected, with a decrease of EMG activity between the T0 and T1 periods on the lower fascicle, except for when pronouncing the /pah/ syllable. Conclusions. Mouth rehabilitation with removable complete dentures decreased oral discomfort and, depending on the oral function, decreased or increased EMG activity of the orbicularis oris muscle. In addition, the lower fascicle was more active than the upper fascicle during rest and most functional activities. Sao Paulo State Univ, Sch Dent, Dept Dent Mat & Prosthodont, Sao Paulo, Brazil Sao Paulo State Univ, Sch Dent, Dept Dent Mat & Prosthodont, Sao Paulo, Brazil

Made available in DSpace on 2018-12-11T17:13:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-11-01 Objective The aim of this study was to evaluate changes in pain and muscle force, and the relationship between them, in patients with muscle pain and bruxism, prior to and after treatment. Methods Thirty women with bruxism and myofascial pain (Ia) were included in this study. Sleep bruxism diagnosis was made based on clinical diagnostic criteria, and awake bruxism diagnosis was made by patient questionnaires and the presence of tooth wear. The diagnosis of myofascial pain was established according to the Research Diagnostic Criteria for Temporomandibular Disorders (RDC-TMD). Dentulous or partially edentulous patients (rehabilitated with conventional fixed prostheses) were included in the study according to the inclusion and exclusion criteria. The pain treatment protocol included occlusal splints, patient education, and physiotherapy for 30 days. Bite force was measured using a dynamometer at the central incisor and the first molar regions on both sides. The exams were performed at baseline, after 7 days, and 30 days after treatment. The Wilcoxon test was used to compare patient pain level response among the periods analyzed in the study. Bite force data were submitted to two-way repeated-measures ANOVA, followed by the Tukey HSD test (p

The absence of ocular content may be congenital [1] or acquired due to surgical removal which can be indicated in several cases such as traumas [2–4], cancer, blind painful eye, microphathalmos, en...

Made available in DSpace on 2022-04-29T08:32:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-06-01 This study aimed to evaluate the effect of a bleaching agent on the color of extrinsically pigmented indirect composite resins. Samples of five resins (Adoro, Resilab, Cristobal, Sinfony, Epricord) were manufactured and divided into five groups: red wine, coffee, orange juice, Coca-Cola, and artificial saliva (control). The stained samples were immersed in a 38% hydrogen peroxide solution for 30 min per week, over three weeks. Color readings were performed at the initial state (L0), after 21 days of dye immersion (∆E1, L1), and after 7 (∆E2, L2), 14 (∆E3, L3), and 21 days (∆E4, L4) of bleach immersion. Data were subjected to ANOVA and Tukey’s honestly significant difference (HSD) test (α = 0.05). The color alteration was greater in ∆E1, regardless of color solution, indicating extrinsic pigmentation. The Resilab group exhibited greater ∆E1 values than the other resins. The bleaching agent promoted bleaching action on the surfaces of the materials studied, removing the previously impregnated pigments. Department of Dental Materials and Prosthodontics Aracatuba Dental School Sao Paulo State University (UNESP) Department of Dental Materials and Prosthodontics Aracatuba Dental School Sao Paulo State University (UNESP)

This review presents a classification system for maxillofacial prostheses, while explaining its types. It also aims to describe their origin and development, currently available materials, and techniques, predicts the future requirements, and subsequently discusses its avenues for improvement as a restorative modality. A literature search of the PubMed/Medline database was performed. Articles that discussed the history, types, materials, fabrication techniques, clinical implications, and future expectations related to maxillofacial prostheses and reconstruction were included. Fifty-nine articles were included in this review. Maxillofacial prostheses were classified as restorative or complementary with subclassifications based on the prostheses finality. The origin of maxillofacial prostheses is unclear; however, fabrication techniques and materials have undergone several changes throughout history. Currently, silicones and acrylic resins are the most commonly used materials to fabricate customized prostheses. Maxillofacial prostheses not only restore several types of orofacial defects but also improve the patients’ quality of life. Although the current clinical scenario concerning the field of maxillofacial prostheses is promising, improvements in material quality and techniques for maxillofacial prostheses may be expected in the future, to produce better results in the treatment of patients.

Introduction: New materials are developed all the time to better suit the patients' needs, such as flexible injectable thermoplastic resins that provide more esthetics to patients using removable partial dentures. Aim: The objective of this study was to evaluate the color change, microhardness and flexural strength of an experimental flexible acrylic resin under the influence of thermocycling. Materials and Methods: This in vitro study was conducted in Aracatuba Dental School, UNESP University. Two types of samples were made, 30 in circular format (3×10 mm) for color and microhardness tests, and 60 in rectangular format (64×10×3.3 mm) for the flexural strength test. The samples were divided into three groups (n=10), one of the experimental flexible resin tested, one with a flexible resin already marketed (Sorriflex), and a control group of a conventional thermopolymerisable acrylic resin (Lucitone). After the preparation, color, microhardness and flexural strength readings were taken, initially and after 2000 thermocycling cycles. The obtained data was submitted to analysis of variance ANOVA and post-hoc Tukey’s test when necessary. Results: All resins presented a clinically acceptable color variation (ΔE), with no significant difference between resin type (p>0.05). There was a difference in the hardness of resins in ascending order (Sorriflex, experimental and Lucitone) and the hardness increased after thermocycling (p