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5. Implant survival in immediately loaded full-arch rehabilitations following an anatomical classification system

Author

Caramês, João Manuel Mendez, Marques, Duarte Nuno da Silva, Vieira, Filipe Araújo, and Repositório da Universidade de Lisboa

Abstract

This retrospective study analyzed implant survival of immediate implant-supported fixed complete denture (IFCD) treatment options (TOs) based on the level of alveolar atrophy (CC). Records of 882 patients receiving a total of 6042 implants at one private referral clinic between 2004 and 2020 were considered. The mean follow-up period was 3.8 ± 2.7 years. Cumulative implant survival rates (CSRs) were analyzed as a function of CCs and TOs according to Mantel-Haenszel and Mantel-Cox. Hazard risk ratios for implant loss were compared using Cox regression. Confounding factors were identified using mixed Cox regression models. The 2- and 5-year CSRs were 98.2% and 97.9%, respectively. Maxillary 2- and 5-year CSRs were lower (97.7% and 97.3%) compared to mandibular CSRs (99.8% and 98.6%) (p = 0.030 and 0.0020, respectively). The CC did not influence CSRs of IFCDs in the mandible (p = 0.1483 and 0.3014, respectively) but only in the maxilla (p = 0.0147 and 0.0111), where CSRs decreased with increasing atrophy. TOs did not statistically differ in terms of survival rate for a given level of alveolar atrophy. The adaption of IFCD treatments to the level of atrophy and patient-specific risk factors can result in high CSRs, even at different levels of bone atrophy.

Published
2021

6. Patient‐related outcomes in Sjögren syndrome treated with stimulants of salivary secretion: Randomized clinical trial

Author

Mata, António Duarte Sola Pereira, Amaral, João Pedro de Almeida Rato, Thomson, William Murray, Barcelos, Filipe, Vaz Patto, José, Pereira, Ruben Miguel Nunes, and Marques, Duarte Nuno da Silva

Subjects
stomatognathic diseases, stomatognathic system, fungi
Abstract

Objectives To investigate the impact of gustatory stimulants of salivary secretion (GSSS) on Sjögren's syndrome patients' self-perception of xerostomia, oral health-related quality of life (OHRQoL) and salivary secretion. Methods A total of 110 Sjögren's syndrome patients were randomly allocated to be treated with either a malic acid lozenge or a citric acid mouthwash and then crossed over. Before and after the interventions, the Xerostomia Inventory 5 (SXI-5-PL) and the Oral Health Impact Profile (OHIP-14-PT) questionnaires (both in the Portuguese language) were administered to patients. Unstimulated, mechanical and gustatory-stimulated salivary flows were determined. Repeated measures and between-subject analyses were performed. Statistical significance was set at 5%. Results After the intervention and within each group, both GSSS elicited a reduction in the SXI-5-PL and OHIP-14-PT scores and an increase in salivary output, significant in the malic acid lozenge group. The malic acid treatment resulted in a greater effect size and percentage improvement than citric acid mouthwash. The malic acid lozenge also produced a significant greater salivary output than the citric acid rising solution. Conclusions In Sjögren's syndrome patients, lozenges containing malic acid increased saliva production and xerostomia relief, resulting in improved quality of life.

Published
2019

11. HIV-1 impact on oral health-related quality of life: a cross-sectional study.

Author

Rocha Trindade, Rúben Teófilo Vasconcelos Moreira, Marques, Joana Rita Oliveira Faria, Veiga, Marcos Alberto Gil da, Marques, Duarte Nuno da Silva, and Mata, António Duarte Sola Pereira da

Subjects
HIV-positive persons, HIV infections, ORAL health, CROSS-sectional method, EFFECT sizes (Statistics), REGRESSION analysis, SOCIOECONOMIC factors, COMPARATIVE studies, QUALITY of life, QUESTIONNAIRES, DESCRIPTIVE statistics, DENTAL caries, HIV
Abstract

This cross-sectional study compared the Oral-Health-Related Quality of Life (OHRQoL) in HIV negative patients (Group 1, n=129, mean age: 39.9 ± 15.6, 75 females) and HIV+ patients (Group 2, n=670, mean age: 43.2 ± 9.8, 246 females) from the same socio-economic environment using the OHIP-49 questionnaire. OHIP total score were determined by simple summing. A multiple linear regression model was carried out to predict OHIP scores in which HIV+ patients experienced a significantly (p<0.001) worst OHRQoL for total and every dimension. A general linear model was used for estimating the means in the two groups adjusted for covariates included in the previous model. Adjusted means for subscale and total OHIP scores were significantly higher for Group 2 (61.6 ± 6.26 vs. 119.8 ± 3.31) with a large effect size (0.94). HIV+ infection, decayed teeth, prosthodontic and surgical needs, care index, drug use, employment and age presented an independent effect on questionnaire scores. This study shows that HIV+ infection has an independent and negative impact on the OHRQoL while care index presents a positive impact. Additional factors like high decayed teeth, prosthodontic treatment needs and drug use are independently associated with total OHIP scores, presenting a negative effect on OHRQoL. [ABSTRACT FROM AUTHOR]

Published
2021
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12. Normas de orientação clínica dos pacientes hipocoagulados em medicina dentária

Author

de Medicina Dentária, Faculdade, de Medicina, Faculdade, de Lisboa, Universidade, de Estudos de Medicina Dentária Baseada na Evidência, Centro, de Coimbra, Universidade, de Estudos de Medicina Baseada na Evidência, Centro, Mata, António Duarte Sola Pereira, Lisboa, Mendonça, Carlota, Portugal, Caramês, João, Fct Uid/Fis/04559/2013, LIBPhys, Aquino, João, Felino, António, Guerra, Fernando, Salvado, Francisco, Carneiro, António, Porto, Universidade do, Marques, Duarte Nuno da Silva, Porto, and Coimbra

Abstract

The increase in the prevalence of hypocoagulated patients attending Dental Medicine care stresses the need of health professionals to be aware of the correct approach to these patients. Thus, the development and dissemination of Evidence Based National Clinical Guideline Stand- ards for hypocoagulated patients, with indication for surgery in the oral cavity, is here present- ed. A number of questions were carefully focused with the objective of classifying and evalu- ating risk procedures in hypocoagulated patients in the pre, peri and postoperative procedures. We conducted a literature review (PubMed and Cochrane Library) with subsequent evaluation of the quality of evidence (Robis and Agree II systems) by several evaluators and finally distilled the appropriate clinical recommendations based on the respective level of evidence and strength of recommendation.

Published
2018
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14. Validity and reliability of a Portuguese version of the Summated Xerostomia Inventory-5

Author

Amaral, João Pedro de Almeida Rato, Marques, Duarte Nuno da Silva, Thomson, William Murray, Vinagre, Alexandra Rosa Rodrigues, and da Mata, António Duarte Sola Pereira

Abstract

Objectives: The aim of this study was to validate and determine the reliability of the Portuguese version of the Summated Xerostomia Inventory. Background: Many conditions such as head and neck radiation, autoimmune diseases or polypharmacy are characterised by hyposalivation which can affect oral and sys- temic quality of life. As such, this condition must be assessed, and the English version of the Xerostomia Inventory has been increasingly used to determine the severity of dry mouth perception. Materials and methods: This was a descriptive cross-sectional study, which employed volunteers suffering from hyposalivation after local ethical committee clearance. Each patient signed an informed consent and responded to the Portuguese version of the questionnaire in the form of an interview. This was repeated again after 2 weeks. A standard single question provided a validity check. Data were analysed using Cronbach's α to test its reliability and total and interitem correlation, and intraclass correlation to determine its internal consistency and test-retest reliability. Significance was set at .05. Results: A sample of 103 volunteers was recruited. Cronbach's α was .84 and .87 for the first and second test administrations, respectively. The intraclass correlation coef- ficient value for the test-retest reliability was .93, and scores for the individual items ranged from .79 to .90. The correlation between the total score of the questionnaire and standard single dry mouth question was .66, indicating a very good correlation. Conclusion: Demonstrating excellent psychometric properties, the Summated Xerostomia Inventory (Portuguese Version) is a valid tool for quantifying Xerostomia in a dry mouth-afflicted population.

Published
2017

16. The use of titanium dental implants versus zirconium dioxide dental implants in esthetic zone. Systematic review

Author

Obando Centeno, Juan Carlos, Silva Marques Duarte, Nuno da Silva, Mendez Caramês, João Manuel, Marique García, Carlos, Santiago, Juan, Trapote Mateo, Sergio, and Jiménez García, Jaime

Subjects
Implantes dentales, Tecnología de materiales, Materiales dentales, Odontología, Tecnología médica
Abstract

Background: The use of zirconium dental implants for esthetic purposes seems to have a promising future due to similar survival rates to titanium implants. Other added mentioned proprieties are white color, the small level of bacterial adherence and the high resistance of the material. Aim/Hypothesis: The main aim of this systematic review was to evaluate the zirconium oxide implants success and survival rates (ZrO2) versus the titanium implants (Ti) in the esthetic area. Material and Methods: This Systematic review was registered at PROSPERO with the reference CRD42015019546. Clinical trials that evaluated zirconium oxide implants were searched in seven electronic databases (PubMed, Lilacs, Science Direct, Cochrane Collaboration, Evidence Based Dentistry (EBD), Journal of Evidence-Based Dental Practice (JEBDP), NHS Evidence) till November 2016 and were included according to pre-established inclusion criteria. A manual search was performed on the bibliography of the collected articles, and the authors were contacted for additional references. Success and survival rate for titanium implants (Ti) was compared with the zirconium oxide implants success and survival rate (ZrO2). The quality of the included articles was evaluated using the Critical Appraisal Skills Programme (CASP) criteria, thus being analysed at both study and outcome level. Results: Seventeen articles were included and the results obtained after calculating the data from each study, in which the zirconium oxide dental implants (ZrO2) location (maxilla or mandible, anterior or posterior) is described. Number of patients: 1057. Number of implants of ZrO2: 1916. Survival: 95%. Follow-up Mean: 32 months (2.6 years). In order to analyze the information about the esthetic area, the studies which did not describe the placement of the zirconium oxide implants in the anterior area (ZrO2) were discarded, only implants placed from 14 to 24 and 34 to 44 (esthetic area) were accounted for: 486 ZrO2 implants, 94% survival, 29 months of follow-up (2.4 years). Of the included studies only two were randomized controlled trials, twelve prospective trials and three retrospective studies. Several methodological limitations on the collected articles and debated in this review. The overall survival rate of the zirconium oxide implants of one and two pieces resulted in 95%. Conclusions and Clinical Implications: Although the available scientific evidence base is and at considerable risk of bias, from the available data it is possible to conclude that zirconia dental implants could be used in esthetic zone with 94% survival. The different study designs and methodology make difficult to present an overall conclusion regarding the efficacy of ZrO2 implants in maintaining crestal bone levels and peri-implant soft tissue health. Further long-term, randomized controlled trials with a standard methodology are needed. Sin financiación 4.305 JCR (2017) Q1, 4/91 Dentistry, Oral Surgery & Medicine, 8/78 Engineering, Biomedical UEM

Published
2017

18. Patient‐related outcomes in Sjögren syndrome treated with stimulants of salivary secretion: Randomized clinical trial.

Author

da Mata, António Duarte Sola Pereira, Amaral, João Pedro de Almeida Rato, Thomson, William Murray, Barcelos, Filipe, Vaz Patto, José, Pereira, Ruben Miguel Nunes, and Marques, Duarte Nuno da Silva

Subjects
SJOGREN'S syndrome diagnosis, SALIVA analysis, CITRATES, CROSSOVER trials, ORAL hygiene, MOUTHWASHES, HEALTH outcome assessment, QUALITY of life, QUESTIONNAIRES, SJOGREN'S syndrome, STATISTICAL significance, RANDOMIZED controlled trials, REPEATED measures design, PATIENTS' attitudes, XEROSTOMIA
Abstract

Objectives: To investigate the impact of gustatory stimulants of salivary secretion (GSSS) on Sjögren's syndrome patients' self‐perception of xerostomia, oral health‐related quality of life (OHRQoL) and salivary secretion. Methods: A total of 110 Sjögren's syndrome patients were randomly allocated to be treated with either a malic acid lozenge or a citric acid mouthwash and then crossed over. Before and after the interventions, the Xerostomia Inventory 5 (SXI‐5‐PL) and the Oral Health Impact Profile (OHIP‐14‐PT) questionnaires (both in the Portuguese language) were administered to patients. Unstimulated, mechanical and gustatory‐stimulated salivary flows were determined. Repeated measures and between‐subject analyses were performed. Statistical significance was set at 5%. Results: After the intervention and within each group, both GSSS elicited a reduction in the SXI‐5‐PL and OHIP‐14‐PT scores and an increase in salivary output, significant in the malic acid lozenge group. The malic acid treatment resulted in a greater effect size and percentage improvement than citric acid mouthwash. The malic acid lozenge also produced a significant greater salivary output than the citric acid rising solution. Conclusions: In Sjögren's syndrome patients, lozenges containing malic acid increased saliva production and xerostomia relief, resulting in improved quality of life. [ABSTRACT FROM AUTHOR]

Published
2020
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21. Eficácia do produto de branqueamento in office paint-onVivastyle com diferentes tipos de isolamento relativo

Author

Cardoso, Ana Beatriz Lopes, Marques, Duarte Nuno da Silva, and Silveira, João Miguel Lourenço

Subjects
Saúde Oral, Teses de mestrado - 2020
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa - Faculdade de Medicina Dentária, 2020 Submitted by Luiza Baptista (luiza.baptista@fmd.ulisboa.pt) on 2021-02-19T11:04:44Z No. of bitstreams: 1 Dissertação_ MIMD_Ana_Beatriz_Cardoso_2019-2020_.pdf: 885392 bytes, checksum: a7a713d3433f7d205a6ab982a3373df8 (MD5) Made available in DSpace on 2021-02-19T11:55:29Z (GMT). No. of bitstreams: 1 Dissertação_ MIMD_Ana_Beatriz_Cardoso_2019-2020_.pdf: 885392 bytes, checksum: a7a713d3433f7d205a6ab982a3373df8 (MD5) Previous issue date: 2020-11-19

Published
2020

22. Efeitos de estimulantes gustativos de secreção salivar na cavidade oral e qualidade de vida numa população portuguesa com Síndrome de Sjögren primária

Author

Almeida Amaral, Joao, Marques, Duarte Nuno da Silva, and Mata, Duarte Sola Pereira da

Subjects
Erosão Dentária, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Síndrome de Sjögren, Saliva, Desfechos Centrados Paciente, Qualidade de Vida
Abstract

Submitted by Paula Guerreiro (passarinho@reitoria.ulisboa.pt) on 2019-09-16T10:29:57Z No. of bitstreams: 1 ULSD733475_td_João_Amaral.pdf: 3759857 bytes, checksum: 8a4a2cf576bf327bf009e08ea38ee750 (MD5) Made available in DSpace on 2019-09-17T16:32:24Z (GMT). No. of bitstreams: 1 ULSD733475_td_João_Amaral.pdf: 3759857 bytes, checksum: 8a4a2cf576bf327bf009e08ea38ee750 (MD5) Previous issue date: 2019

Published
2019

23. Soft tissue replication in single unit implant impressions: a three-dimemsional clinical study

Author

Pinto, Ricardo Jorge Marques, Marques, Duarte Nuno da Silva, and Caramês, João Manuel Mendes

Subjects
Ciências, Saúde oral, Medicina Clínica, Teses de mestrado - 2019
Abstract

Submitted by Luiza Baptista (luiza.baptista@fmd.ulisboa.pt) on 2020-01-20T16:33:45Z No. of bitstreams: 1 ulfmd_08817_tm_Ricardo_Pinto.pdf: 826211 bytes, checksum: 635626e97ba2d6ead2dc804e515af58f (MD5) Made available in DSpace on 2020-01-20T16:34:29Z (GMT). No. of bitstreams: 1 ulfmd_08817_tm_Ricardo_Pinto.pdf: 826211 bytes, checksum: 635626e97ba2d6ead2dc804e515af58f (MD5) Previous issue date: 2019

Published
2019

24. Comparação de métodos de determinação de cor dentária: visuais versus espectrofotométricos - estudo in vivo

Author

Alves, Rita Vanessa Aparício Aguiar, Marques, Duarte Nuno da Silva, 1978, and Silveira, João Miguel Lourenço

Subjects
Estética dentária, Cor dos dentes, Teses de mestrado - 2017, Ciências Médicas::Medicina Clínica [Domínio/Área Científica]
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2017 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2017-10-20T15:05:09Z No. of bitstreams: 1 ulfmd08352_tm_Rita_Alves.pdf: 1055645 bytes, checksum: 67ac186cd8b6b63ba9a5033c72efc159 (MD5) Made available in DSpace on 2017-11-02T16:31:30Z (GMT). No. of bitstreams: 1 ulfmd08352_tm_Rita_Alves.pdf: 1055645 bytes, checksum: 67ac186cd8b6b63ba9a5033c72efc159 (MD5) Previous issue date: 2017

Published
2017

25. Determinação da cor por dois métodos espectrofotométricos

Author

Dias, Susana Beatriz Ferreira, Marques, Duarte Nuno da Silva, 1978, and Mata, António Duarte, 1968

Subjects
Teses de mestrado - 2016, Cor dos dentes, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Materiais dentários
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2017-01-26T10:06:07Z No. of bitstreams: 1 ulfmd06048_tm_Susana_Dias.pdf: 866567 bytes, checksum: 5de4832569b7655b796ffdbcde9c73b0 (MD5) Made available in DSpace on 2017-01-26T12:44:05Z (GMT). No. of bitstreams: 1 ulfmd06048_tm_Susana_Dias.pdf: 866567 bytes, checksum: 5de4832569b7655b796ffdbcde9c73b0 (MD5) Previous issue date: 2016

Published
2016

26. Influência da pressão pulpar positiva na difusão de peróxido de hidrogénio de um produto de branqueamento através dos tecidos dentários in vitro: ensaio piloto

Author

Cardoso, Catarina Guerreiro Martins Crêspo, Marques, Duarte Nuno da Silva 1978, and Mata, António Duarte Sola Pereira da 1968

Subjects
Branqueamento dentário, Teses de mestrado - 2015, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Peróxido de hidrogénio
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2015 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2016-12-20T12:00:23Z No. of bitstreams: 1 ulfmd02862_tm_Catarina_Cardoso.pdf: 1144181 bytes, checksum: 299e5d0e0f33a92c9aad5909522d06e4 (MD5) Made available in DSpace on 2016-12-29T10:51:16Z (GMT). No. of bitstreams: 1 ulfmd02862_tm_Catarina_Cardoso.pdf: 1144181 bytes, checksum: 299e5d0e0f33a92c9aad5909522d06e4 (MD5) Previous issue date: 2015

Published
2015

27. Eficácia clínica dos localizadores apicais eletrónicos: revisão científica

Author

Martins, Jorge N. R. and Marques, Duarte Nuno da Silva, 1978

Subjects
Teses de mestrado - 2012, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Radiologia oral
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2012 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2017-02-20T11:29:14Z No. of bitstreams: 1 ulfmd07059_tm_Jorge_Martins.pdf: 7467245 bytes, checksum: 10890436bfe13707b8ee760ff2de0049 (MD5) Made available in DSpace on 2017-02-24T15:58:20Z (GMT). No. of bitstreams: 1 ulfmd07059_tm_Jorge_Martins.pdf: 7467245 bytes, checksum: 10890436bfe13707b8ee760ff2de0049 (MD5) Previous issue date: 2012

Published
2012

28. Efeitos dos estimulantes gustativos e a sua libertação de flúor: estudo piloto

Author

Cruz, Mariana Freitas Brito Da and Marques, Duarte Nuno da Silva, 1978

Subjects
Saúde oral, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Teses de mestrado - 2011
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2011 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2017-03-23T11:57:32Z No. of bitstreams: 1 ulfmd08040_tm_Mariana_Cruz.pdf: 1462663 bytes, checksum: 5432c38481c597454a1dd423827257b3 (MD5) Made available in DSpace on 2017-03-27T11:30:15Z (GMT). No. of bitstreams: 1 ulfmd08040_tm_Mariana_Cruz.pdf: 1462663 bytes, checksum: 5432c38481c597454a1dd423827257b3 (MD5) Previous issue date: 2011

Published
2011

29. Efeito da pigmentação extrínseca na perceção da cor dentária: estudo in vivo

Author

Corado, Daniela Patrícia Cândido, Marques, Duarte Nuno da Silva, 1978, and Silveira, João

Subjects
Estética dentária, Cor dos dentes, Teses de mestrado - 2017, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Pigmentação
Abstract

Tese de mestrado, Medicina Dentária, Universdade de Lisboa, Faculdade de Medicina Dentária, 2017 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2017-10-19T09:50:05Z No. of bitstreams: 1 ulfmd08330_tm_Daniela_Corado.pdf: 923026 bytes, checksum: 8b2a1aa0eb5053b5cfd8a7dbb4752c39 (MD5) Made available in DSpace on 2017-10-31T16:19:44Z (GMT). No. of bitstreams: 1 ulfmd08330_tm_Daniela_Corado.pdf: 923026 bytes, checksum: 8b2a1aa0eb5053b5cfd8a7dbb4752c39 (MD5) Previous issue date: 2017

30. Citotoxicidade do peróxido de hidrogénio: estudos do comportamento celular numa linhagem de células osteoblásticas fetais humanas condicionalmente imortalizadas

Author

Vieira, Andreia Bandeira Luís, Marques, Duarte Nuno da Silva, 1978, and Mata, António Duarte Sola Pereira da

Subjects
Branqueamento dentário, Teses de mestrado - 2016, Ciências Médicas::Medicina Clínica [Domínio/Área Científica], Peróxido de hidrogénio
Abstract

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016 Submitted by Patrícia Torres (patricia.torres@campus.ul.pt) on 2017-01-19T12:06:25Z No. of bitstreams: 1 ulfmd06068_tm_Andreia_Vieira.pdf: 816050 bytes, checksum: f5b056304f63b9fd15bc3e578b9efdc3 (MD5) Made available in DSpace on 2017-01-20T17:22:47Z (GMT). No. of bitstreams: 1 ulfmd06068_tm_Andreia_Vieira.pdf: 816050 bytes, checksum: f5b056304f63b9fd15bc3e578b9efdc3 (MD5) Previous issue date: 2016

31. Cie L*A*B* Values in VITA Classical and VITA 3D Master by Two Dental Spectrophotometers.

Author

Dias SBF, Silveira JML, Pereira RMN, Cardoso AB, Pereira da Mata ADS, and Marques DNDS

Subjects
Color, Spectrophotometry, Colorimetry, Dental Prosthesis Design, Prosthesis Coloring
Abstract

Purpose: To compare the CIE L*a*b* values of two different dental shade guides using two shade-matching spectrophotometers., Materials and Methods: SpectroShade Micro (SS) and Easyshade (ES) (VITA Zahnfabrik) were tested. One calibrated operator performed 30 measurements of each tab from three batches of the two guides, VITA Classical (VC) and VITA 3D Shade Master (VM). Receiver operating characteristic (ROC) curves and intraclass coefficients (ICC) between the different batches were calculated. Results were given as mean and SD of the L*a*b* values and the respective color differences according to the CIEDE 2000 formula (ΔE00) for each of the shade tabs in the two spectrophotometers and then analyzed with independent student t test (α = .05)., Results: A total of 1,440 and 2,610 measurements for VC and VM, respectively, were performed per spectrophotometer. There were statistically significant differences between the two devices for all L*a*b* values, with the exception of: L* for 3R1.5; a* for 2R1.5, 3L1.5, 2L2.5, 3M2, 3L2.5, 4L1.5, and 4L2.5; and b* for D3, 1M2, and 3M2. When assessing the same shade guide, differences in ΔE00 were detected between devices above the acceptability threshold (AT) (ΔE00 ≥ 1.8) for all shade tabs except for VC (C1, C2, D3, A3.5, C3, and A4) and VM (4M1, 3R2.5, 4L2.5, and 4M3). The overall mean of the interdevice ΔE00 was 2.2 ± 1.0 for VC and 2.5 ± 1.0 for VM., Conclusions: The two dental spectrophotometers presented high ICC and ROC values, which validates their indication as auxiliary tools. However, there are discrepancies in the hues D (VC) and R (VM) with interdevice variability when evaluated for the L*a*b* component. Int J Prosthodont 2023;36:e38-e52.

Published
2023
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32. Hydrogen peroxide release kinetics into saliva from different whitening products: a double-blind, randomized clinical trial.

Author

Marques DN, da Mata AD, Silveira JM, Marques JR, Amaral JP, and Guilherme NF

Subjects
Carbamide Peroxide, Double-Blind Method, Drug Combinations, Female, Follow-Up Studies, Humans, Male, Peroxides pharmacokinetics, Photometry, Placebos, Polyvinyls pharmacokinetics, Safety, Time Factors, Tooth Bleaching instrumentation, Tooth Bleaching methods, Urea analogs & derivatives, Urea pharmacokinetics, Young Adult, Hydrogen Peroxide pharmacokinetics, Saliva metabolism, Tooth Bleaching Agents pharmacokinetics
Abstract

The objective of this study is to compare salivary hydrogen peroxide (HP) release kinetics and potential toxicity of systemic exposure of four different whitening products. A double-blind, randomized controlled trial was conducted in a Portuguese dental faculty clinic. Two hundred forty volunteers were randomized to eight intervention groups. Participants were randomly assigned to receive active or placebo applications of one of four different products: Opalescence 10% PF™ (OPL), Vivastyle® 10%™ (VS10%), Vivadent Paint On Plus™ (PO+), and Trés White Supreme™ (TWS). Saliva collection was obtained by established methods at different times. The HP salivary content was determined by a photometric method. Salivary HP variations, total amount of salivary HP, and counts of subjects above the safe daily HP dose were the main outcome measures. All whitening systems significantly released HP to the saliva when compared to placebo, and all showed different release kinetics. The adaptable tray system (TWS) presented a risk increase of 37% [20-54%, 95% confidence interval] when compared to the other systems. The use of an adaptable tray whitening system with higher concentration of HP increases the toxicity potential.

Published
2012
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33. A novel technique for in-office bleaching with a 6% hydrogen peroxide paint-on varnish.

Author

da Mata AD and Marques DN

Subjects
Color, Colorimetry, Dental Offices, Follow-Up Studies, Gingiva drug effects, Humans, Hydrogen Peroxide administration & dosage, Oxidants administration & dosage, Paint, Photography, Time Factors, Tooth drug effects, Tooth pathology, Hydrogen Peroxide therapeutic use, Oxidants therapeutic use, Tooth Bleaching methods
Abstract

In-office techniques for bleaching vital teeth are effective and expedient, but because they require the use of elevated concentrations of hydrogen peroxide-based agents, which are caustic and potentially toxic, they are found to be less appealing by practitioners compared with home whitening procedures. In this article we propose a new technique for in-office whitening of vital teeth using a 6% hydrogen peroxide paint-on whitening varnish, which enables the whitening procedure to be more economic and user-friendly, as well as less toxic and time consuming, compared with traditional in-office bleaching. A total of six patients with no caries or restorations in the maxillary and mandibular anterior teeth were selected for this study. Ten-minute applications of the paint-on whitening varnish were performed repeatedly with each patient for up to 1 hour and then repeated 1 week later. Initial shades were recorded with a Vita scale guide, and photographs were taken at the beginning and end of the study. A questionnaire assessing clinical parameters and patient satisfaction was performed. A change of 7 to 13 values on the Vita scale was observed in all cases. There were no reports of tooth sensitivity, and overall patient satisfaction was achieved. In-office bleaching with the use of paint-on varnishes seems to be effective, safe, and well accepted by patients, offering a viable alternative to high-peroxide-concentration in-office procedures.

Published
2006

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