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1.
J. health sci. (Londrina) ; 23(3): 212-215, 20210920.
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1292770

RESUMO

Cheiloscopy is the analysis of the lip prints, grooves, thicknesses, angles, and other structures of the lips that differentiate each individual in a similar way to biometrics. This study aimed to observe these lips characteristics and to verify if there is a labial pattern among the students of the UFVJM Dentistry course of that distinguishes them in genders. Fifty students were selected, photographed, and had their samples collected by printing their lips on transparent tape with wine 01 lipstick, evenly distributed with the aid of a flexible rod and attached on white paperboard and later classified for obtaining the data required for statistical analysis. When analyzing lip thickness, it was found that most of the students had thick lips - 78%, whereas regarding the position of the labial commissure, 50% of the students presented horizontal disposition. Through the classification system of Suzuki and Tsuchihashi the types of furrows were classified, type II being the most common in this research. Despite the evidence that, among the volunteering students , female lips are thinner than male lips, there were no statistically significant differences between men and women. However, there is a need for more studies that seek to validate and disseminate this technique in a standardized way so that it is a complementary tool in Forensic Dentistry. (AU)


Queiloscopia é a análise das impressões labiais, sulcos, espessuras, ângulos e demais estruturas dos lábios, que diferenciam cada indivíduo de forma similar à biometria. Este estudo teve como objetivo observar as características labiais e verificar se existe um padrão labial entre os estudantes matriculados no curso de Odontologia da UFVJM que os distingue em gênero. Para isto, cinquenta alunos foram selecionados, fotografados e tiveram deus dados coletados por meio da impressão labial em fita adesiva transparente com batom vinho 01, distribuído uniformemente com o auxílio de uma haste flexível e anexada em cartolina branca e, posteriormente, classificadas para obtenção dos dados necessários à análise estatística. Ao analisar a espessura labial, constatou-se que a maioria dos estudantes possuíam lábios grossos - 78%, já em relação a posição da comissura labial 50% dos alunos apresentaram disposição horizontal. Através do sistema de classificação de Suzuki e Tsuchihashi foram classificados os tipos de sulcos, sendo o tipo II o mais comum entre os sujeitos da pesquisa. Apesar da comprovação de que, entre os estudantes voluntários, os lábios femininos possuem menor espessura que os masculinos, não existindo diferenças estatisticamente significantes entre homens e mulheres. Contudo, existe a necessidade de mais estudos que busquem validar e difundir esta técnica de forma padronizada para que seja uma ferramenta complementar na Odontologia Forense. (AU)

2.
Rev. Bras. Odontol. Leg. RBOL ; 7(3): [2-11], 20201206.
Artigo em Português | LILACS | ID: biblio-1281457

RESUMO

A análise da impressão labial, conhecida como queiloscopia, pode ser útil em casos específicos de investigação forense. Este trabalho experimental teve como objetivos principais investigar a precisão na análise dos tipos de sulcos labiais, da espessura labial e da localização da comissura labial e observar diferenças estatísticas entre a classificação labial e o sexo dos indivíduos. A amostra foi composta por 100 voluntários. Foi realizada a mensuração da espessura labial com paquímetro, análise visual da comissura labial e classificação dos sulcos labiais por meio de sua impressão, sendo testada a concordância intra- e inter-observador (três avaliadores) pela reavaliação de 30% da amostra. Os resultados mostraram que é possível realizar a classificação das análises labiais, sendo que o tipo de lábio mais frequente encontrado foi o tipo I (34,25%). Em relação à espessura, o tipo misto, e a comissura do tipo abaixada, foram as predominantes, com 66% e 59% respectivamente. Além disso, observou-se que não houve diferença estatística entre os indivíduos do sexo masculino e feminino nas classificações estudadas. Em relação à precisão ao fazer as classificações as técnicas utilizadas foram consideradas aplicáveis pelos pesquisadores, uma vez que a classificação foi possível e a concordância observada foi de forte a moderada, exceto em um dos quadrantes da classificação da impressão labial


Assuntos
Humanos , Masculino , Feminino , Precisão da Medição Dimensional , Odontologia Legal , Lábio
3.
Clin Oral Investig ; 24(7): 2271-2283, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31686235

RESUMO

OBJECTIVES: The aim of this study was to longitudinally evaluate, after a 4-year period, the clinical longevity of composite resin restoration compared to the baseline, after selective caries removal in permanent molars using Er:YAG laser or bur preparation with biomodification of dentin with the use of chlorhexidine. METHODS: Selective caries removal was performed on 80 teeth of 20 individuals who each had at least four active carious lesions. These lesions, located on occlusal surfaces of permanent molar counterparts, were removed using (i) Er:YAG laser biomodified with chlorhexidine, (ii) Er:YAG laser and application of deionized water, (iii) bur preparation biomodified with chlorhexidine, and (iv) bur preparation and application of deionized water. At the end of 4 years, 64 of the 80 restorations were evaluated in 16 individuals (n = 16). The restorations were evaluated, both clinically and photographically, using scanning electron microscopy (SEM) and pulp vitality analysis. The experimental data were statistically evaluated by kappa, Fisher's, and chi-square tests, with a significance level of 5%. The Kaplan-Meier test and the Cox regression analysis were used to evaluate the survival of the restorations. RESULTS: After 4 years of follow-up, there was a statistically significant difference in marginal discoloration criteria for all of the groups evaluated. For marginal adaptation criteria, there was a statistically significant difference for the Er:YAG laser group biomodified with chlorhexine (p = 0.050). For clinical and radiographic evaluation of pulp vitality, there were no statistically significant differences among the groups (p = 0.806). CONCLUSION: Er:YAG laser can be used for selective caries removal, regardless of dentin biomodification with chlorhexidine or application of deionized water, once it produced promising results in composite resin restorations after 4 years of follow-up, according to the criteria evaluated. The selective caries removal using Er:YAG laser or bur and the biomodification of dentin with the use of chlorhexidine did not influence the survival of composite resin restorations after the 4-year follow-up period. CLINICAL RELEVANCE: Composite resin restorations applied after selective caries removal using Er:YAG laser or burs, regardless of dentin biomodification with the use of chlorhexidine or application of deionized water, showed adequate clinical behavior after 4 years of follow-up.


Assuntos
Resinas Compostas , Cárie Dentária , Restauração Dentária Permanente , Lasers de Estado Sólido , Cárie Dentária/terapia , Preparo da Cavidade Dentária , Dentina , Seguimentos , Humanos , Lasers de Estado Sólido/uso terapêutico , Estudos Prospectivos
4.
Int J Paediatr Dent ; 29(3): 294-300, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30656749

RESUMO

BACKGROUND: Tooth eruption is a process that is not fully understood. AIM: To evaluate whether genetic polymorphisms for RANK/RANKL/OPG are associated with delayed tooth emergence. To evaluate whether the relative expression of this genes is associated with persistent primary teeth. DESIGN: To evaluate whether genetic polymorphisms for RANK/RANKL/OPG could be involved in delayed tooth emergence, saliva samples from 160 children, aged 6-13 years old, were analysed. To test if there is correlation between gene expression of RANK/RANKL/OPG in children with delayed tooth emergence and persistent primary teeth, periapical tissue from 15 children with persistent primary teeth and from 15 control subjects were collected for qPCR analysis. RESULTS: Fifty-six children with delayed tooth emergence (35%) had at least one permanent tooth with delayed emergence. The T allele in RANKL (rs9594738) increased the risk of delayed tooth emergence (P = 0.02; OR = 1.71, 95%CI 1.09-2.75). The relative gene expression for RANKL and the ratio RANKL/OPG in children with delayed tooth emergence and persistent primary teeth were lower compared to controls (P = 0.02 and P = 0.005, respectively). CONCLUSIONS: Data suggest that the polymorphism rs9594738 in RANKL is associated with delayed permanent tooth emergence. Moreover, reduced relative gene expression of RANKL in periapical tissue is associated with persistent primary teeth.


Assuntos
Osteoprotegerina , Erupção Dentária , Adolescente , Criança , Dentição Permanente , Expressão Gênica , Humanos , Dente Decíduo
5.
Acta Odontol Scand ; 77(1): 55-60, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30264624

RESUMO

OBJECTIVE: To investigate whether there are differences between the root canal disinfection, comparing the passive ultrasonic irrigation technique with the conventional technique. MATERIALS AND METHODS: The following electronic databases were searched: Pubmed; VHL; Web of Sciences and OVID with no publication date restriction. The study's quality evaluation was carried out using the Handbook by Cochrane. The online research identified 5464 studies. From the nine studies selected for a full reading of the text, five were included in the present systematic review. Meta-analysis was performed in three articles, which evaluated the root canal's cleanness through microbiological analysis. RESULTS: Only one article concluded that the ultrasonic passive irrigation showed a better performance compared with the conventional irrigation. None of the articles analyzed presented a low risk of bias in all domains. According to the results of the meta-analysis, there was no statistical difference between the groups (OR = 0.34, IC 95%: 0.10-1.19). CONCLUSIONS: The level of evidence comparing the two techniques is fragile since in all studies some type of bias was observed which may interfere in the results and conclusions.


Assuntos
Cavidade Pulpar/microbiologia , Desinfecção/métodos , Irrigantes do Canal Radicular , Irrigação Terapêutica/métodos , Ultrassom/métodos , Humanos , Preparo de Canal Radicular/métodos , Tratamento do Canal Radicular/métodos
6.
Cad. saúde colet., (Rio J.) ; 26(2): 153-159, abr.-jun. 2018. tab
Artigo em Português | LILACS-Express | LILACS | ID: biblio-952513

RESUMO

Resumo Introdução O uso de drogas entre adolescentes está aumentando, e o hábito vem se enraizando cada vez mais precocemente. Objetivo Investigar a associação do uso de drogas lícitas e ilícitas, sexo e condição socioeconômica entre adolescentes de 12 anos. Método Estudo transversal foi realizado em amostra representativa de adolescentes matriculados em escolas públicas e privadas da área urbana de Diamantina, Minas Gerais. Dados foram coletados por meio de questionários autoaplicados. O consumo de drogas foi investigado utilizando o instrumento ASSIST (Teste para Triagem do Envolvimento com Álcool, Cigarro e Outras Substâncias). Para investigar a condição socioeconômica, foram utilizados os indicadores: tipo de escola, renda familiar e escolaridade materna. As associações foram testadas pelos testes do Qui-quadrado de Pearson e Exato de Fisher (p < 0,05). Resultados A prevalência do consumo de álcool foi de 45,6% (260/588); uso de maconha, de 1,5% (9/588); de cocaína, 0,3% (2/588); e de inalantes, 1,7% (10/588). Sexo masculino esteve associado estatisticamente com consumo de maconha (p = 0,018) e de álcool (p = 0,012), mas não com uso de inalantes (p = 0,536). Na amostra estudada, não foi observada associação estatisticamente significativa entre o consumo de drogas ilícitas e os indicadores socioeconômicos. O consumo de álcool esteve associado ao uso de maconha p = 0,013 [OR:9,814 (1,220-78,984)]. Conclusão O consumo de álcool e o uso de maconha estiveram estatisticamente associados com o sexo masculino, mas não com os indicadores socioeconômicos.


Abstract Background Drug use among adolescents is on the rise, and the habit has been taking root at an increasingly early age. Objective Investigate the correlation between use of licit and illicit drugs, sex, and socioeconomic conditions among 12-year-old adolescents. Method Cross sectional study conducted with a representative sample of adolescents enrolled in public and private schools in the urban area of ​​ Diamantina, Minas Gerais state, Brazil. Data were collected through self-administered questionnaires. Consumption of drugs was investigated using the Alcohol, Smoking and Substance Involvement Screening Test (ASSIST) instrument. School type, family income, and maternal education were used to investigate socioeconomic condition. Associations were tested using the Pearson's chi-square and Fisher's exact tests (p < 0.05). Results The following drug consumption prevalence values were found: alcohol, 45.6% (260/588); marijuana, 1.5% (9/588), cocaine, 0.3% (2/588); inhalants, 1.7% (10/588). The male gender was statistically associated with consumption of marijuana (p = 0.018) and alcohol (p = 0.012), but not with use of inhalants (p = 0.536). No statistically significant correlation was observed between consumption of licit and illicit drugs and the socioeconomic indicators adopted. Alcohol consumption was associated with use of marijuana (p = 0.013) [OR:9.814 (1.220 to 78.984)]. Conclusion Alcohol consumption and use of marijuana were statistically associated with the male gender, but not with socioeconomic indicators.

7.
J Appl Oral Sci ; 26: e20170029, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29742259

RESUMO

Literature has reported positive results regarding the use of lasers in the control of erosive lesions; however, evaluating whether they are effective in the control of the progression of erosive/abrasive lesions is important. Objectives This study aimed to evaluate the effect of the Er:YAG laser irradiation in controlling the progression of erosion associated with abrasive lesions in enamel. Material and methods Bovine incisors were sectioned, flattened and polished. Forty-eight enamel slabs were subjected to treatment in an intraoral phase. Twelve volunteers used an intraoral appliance containing one slab that was irradiated with an Er:YAG laser (5.2 J/cm2, 85 mJ, 2 Hz) and another non-irradiated slab on each side of the appliance, during one phase of 5 d, under a split-mouth design. Devices were subjected to erosive challenges (1% citric acid, 5 min, 3 times a day) and abrasive challenges one h after (brushing force of 1.5 N for 15 s) randomly and independently on each side of the device. Measurements of enamel loss were performed via 3D optical profilometry (µm). We analyzed data using the Kruskal-Wallis and Mann-Whitney tests and morphological characteristics via scanning electron microscopy. Results Following erosive and abrasive challenges, the group that was irradiated with the Er:YAG laser presented less loss of structure than the non-irradiated group. The group that underwent erosion and irradiation did not exhibit a significant difference from the non-irradiated group. Conclusion Irradiation with the Er:YAG laser did not control the loss of structure of enamel subjected to erosion but did control abrasion after erosion.


Assuntos
Esmalte Dentário/efeitos da radiação , Lasers de Estado Sólido/uso terapêutico , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Animais , Bovinos , Ácido Cítrico/química , Esmalte Dentário/efeitos dos fármacos , Progressão da Doença , Testes de Dureza , Imageamento Tridimensional , Teste de Materiais , Microscopia Eletrônica de Varredura , Reprodutibilidade dos Testes , Estatísticas não Paramétricas , Propriedades de Superfície/efeitos da radiação
8.
Rev. cuba. estomatol ; 55(1): 3-13, ene.-mar. 2018. tab
Artigo em Português | LILACS | ID: biblio-960396

RESUMO

Introdução: o Código Penal Brasileiro tipifica, em seu artigo 129, o crime de lesão corporal como sendo a ofensa à integridade corporal ou a saúde de outrem. As penas previstas para este crime são graduadas de acordo com o resultado gerado pela lesão, sendo este estabelecido por meio do exame pericial requisitado pela autoridade competente. As lesões dentais são frequentes neste tipo de exame, sendo que as suas resultantes, expressas no Código Penal Brasileiro, são muito discutidas no âmbito pericial, existindo muitas divergências entre examinadores distintos. Objetivo: verificar a interpretação penal de lesões em dentes ântero-superiores por Peritos Oficiais Odontolegistas do Instituto Médico Legal Nina Rodrigues (Salvador, Bahia, Brasil). Métodos: foram analisados 2 738 laudos emitidos no período de janeiro de 2007 a dezembro de 2011, por estes peritos nesse intervalo de cinco anos. O critério de inclusão foi a descrição de acometimento de dente permanente na região ântero-superior e o critério de exclusão foi o não enquadramento com segurança em algum tipo de lesão especificada. A coleta de dados foi feita por um único indivíduo, o qual teve acesso aos laudos. As lesões dentais descritas nos laudos foram classificadas e codificadas, de forma a facilitar as anotações e os estudos estatísticos por meio do teste do Qui-Quadrado e teste Kappa (software R, versão 2.15.2, R Development Core Team, 2012) (p≥ 0,05). Resultados: dos 2 738 laudos, 277 atenderam os critérios de inclusão, em que 32,16 porcento descreviam fraturas dentais coronárias simples, 31,72 porcento como fraturas complexas e 36,12 porcento como avulsão. Os resultados obtidos apresentaram uma forte associação entre o perito examinador e a resultante penal estabelecida, na análise de lesões dentais. Conclusão: conclui-se que a avaliação penal das lesões dentais mostrou-se fortemente subjetiva, sendo necessários maiores estudos e discussões a respeito do tema, de forma a minimizar a subjetividade(AU)


Introducción: el Código Penal brasileño tipifica en su artículo 129, el delito de lesiones corporales como la ofensa a la integridad corporal o la salud de los demás. Las penas por este delito se clasifican de acuerdo con los resultados generados por la lesión, que se establece a través de un examen forense ordenado por la autoridad competente. Lesiones dentales son comunes en este tipo de examen, y del análisis de sus resultados a partir del Código Penal brasileño, es tema de frecuentes debates entre expertos forenses, con muchas divergencias entre los distintos examinadores. Objetivo: investigar la interpretación penal de las lesiones en los dientes anteriores superiores por expertos Oodontolegistas Oficial Forense Instituto Nina Rodrigues (Salvador, Bahia, Brasil). Métodos: se analizaron 2 738 informes emitidos entre enero de 2007 y diciembre de 2011, por los expertos en un intervalo de cinco años. El criterio de inclusión fue la descripción de la afectación de los dientes permanentes en la región anterior superior y el criterio de exclusión fue no haber implicación segura en algún tipo de lesión especificada. La reunión de datos fue hecha por un solo individuo, que tuvo acceso a los informes. Lesiones dentales que se describen en los informes fueron clasificadas y codificadas con el fin de facilitar las notas y estudios estadísticos mediante la prueba de chi cuadrado y la prueba de Kappa (software R, versión 2.15.2, Core Development Team R, 2012) (p≥ 0,05). Resultados: de los 2 738 informes, 277 cumplieron con los criterios de inclusión, en los cuales 32,16 por ciento describe fracturas dentales simples coronarias, 31,72 por ciento fracturas complejas y 36,12 por ciento como avulsión. Los resultados muestran una fuerte asociación entre el experto forense y criminal establecido que resulta en el análisis de las lesiones dentales. Conclusiones: se concluye que la evaluación penal de lesiones dentales era fuertemente subjetiva, lo que requiere más estudios y debates sobre el tema, con el fin de reducir al mínimo la subjetividad(AU)


Introduction: Article 129 of the Brazilian Penal Code defines the crime of bodily harm as damage to the physical integrity or the health of others. Penalties for this crime are graded in keeping with the consequences of the injury, determined by forensic examination indicated by the corresponding authority. Dental injuries are common in this type of examination, and analysis of results based on the Brazilian Penal Code is the object of frequent debate among forensic experts, with many divergences between the various examiners. Objective: Analyze the penal interpretation of injuries to upper front teeth provided by official forensic odontology experts from Nina Rodrigues Forensic Institute (Salvador, Bahia, Brazil). Methods: Analysis was conducted of 2 738 expert reports issued in the five-year period extending from January 2007 to December 2011. The inclusion criterion was description of injury to permanent upper front teeth, whereas the exclusion criterion was lack of certainty as to the consequences of the injury specified. Data were gathered by a single individual, who had access to the reports. The dental injuries described in the reports were classified and encoded to facilitate annotation and the performance of statistical studies based on chi-square estimation and the kappa test (R software version 2.15.2, R Core Development Team, 2012) (p≥ 0.05). Results: Of the 2 738 reports, 277 met the inclusion criterion. Of the injuries described therein, 32.16 percent were classified as simple dental crown fractures, 31.72 percent as complex fractures, and 36.12 percent as avulsions. Results show the close relationship between forensic experts and criminal investigators in the analysis of dental injuries. Conclusions: Penal assessment of dental injuries was markedly subjective, requiring further study and discussion to minimize such subjectivity(AU)


Assuntos
Humanos , Traumatismos Dentários/etiologia , Odontologia Legal/normas , Responsabilidade Penal , Estatística como Assunto/métodos
9.
Rev. cuba. estomatol ; 55(1): 3-13, ene.-mar. 2018. tab
Artigo em Português | CUMED | ID: cum-72228

RESUMO

Introdução: o Código Penal Brasileiro tipifica, em seu artigo 129, o crime de lesão corporal como sendo a ofensa à integridade corporal ou a saúde de outrem. As penas previstas para este crime são graduadas de acordo com o resultado gerado pela lesão, sendo este estabelecido por meio do exame pericial requisitado pela autoridade competente. As lesões dentais são frequentes neste tipo de exame, sendo que as suas resultantes, expressas no Código Penal Brasileiro, são muito discutidas no âmbito pericial, existindo muitas divergências entre examinadores distintos. Objetivo: verificar a interpretação penal de lesões em dentes ântero-superiores por Peritos Oficiais Odontolegistas do Instituto Médico Legal Nina Rodrigues (Salvador, Bahia, Brasil). Métodos: foram analisados 2 738 laudos emitidos no período de janeiro de 2007 a dezembro de 2011, por estes peritos nesse intervalo de cinco anos. O critério de inclusão foi a descrição de acometimento de dente permanente na região ântero-superior e o critério de exclusão foi o não enquadramento com segurança em algum tipo de lesão especificada. A coleta de dados foi feita por um único indivíduo, o qual teve acesso aos laudos. As lesões dentais descritas nos laudos foram classificadas e codificadas, de forma a facilitar as anotações e os estudos estatísticos por meio do teste do Qui-Quadrado e teste Kappa (software R, versão 2.15.2, R Development Core Team, 2012) (p≥ 0,05). Resultados: dos 2 738 laudos, 277 atenderam os critérios de inclusão, em que 32,16 porcento descreviam fraturas dentais coronárias simples, 31,72 porcento como fraturas complexas e 36,12 porcento como avulsão. Os resultados obtidos apresentaram uma forte associação entre o perito examinador e a resultante penal estabelecida, na análise de lesões dentais. Conclusão: conclui-se que a avaliação penal das lesões dentais mostrou-se fortemente subjetiva, sendo necessários maiores estudos e discussões a respeito do tema, de forma a minimizar a subjetividade(AU)


Introducción: el Código Penal brasileño tipifica en su artículo 129, el delito de lesiones corporales como la ofensa a la integridad corporal o la salud de los demás. Las penas por este delito se clasifican de acuerdo con los resultados generados por la lesión, que se establece a través de un examen forense ordenado por la autoridad competente. Lesiones dentales son comunes en este tipo de examen, y del análisis de sus resultados a partir del Código Penal brasileño, es tema de frecuentes debates entre expertos forenses, con muchas divergencias entre los distintos examinadores. Objetivo: investigar la interpretación penal de las lesiones en los dientes anteriores superiores por expertos Oodontolegistas Oficial Forense Instituto Nina Rodrigues (Salvador, Bahia, Brasil). Métodos: se analizaron 2 738 informes emitidos entre enero de 2007 y diciembre de 2011, por los expertos en un intervalo de cinco años. El criterio de inclusión fue la descripción de la afectación de los dientes permanentes en la región anterior superior y el criterio de exclusión fue no haber implicación segura en algún tipo de lesión especificada. La reunión de datos fue hecha por un solo individuo, que tuvo acceso a los informes. Lesiones dentales que se describen en los informes fueron clasificadas y codificadas con el fin de facilitar las notas y estudios estadísticos mediante la prueba de chi cuadrado y la prueba de Kappa (software R, versión 2.15.2, Core Development Team R, 2012) (p≥ 0,05). Resultados: de los 2 738 informes, 277 cumplieron con los criterios de inclusión, en los cuales 32,16 por ciento describe fracturas dentales simples coronarias, 31,72 por ciento fracturas complejas y 36,12 por ciento como avulsión. Los resultados muestran una fuerte asociación entre el experto forense y criminal establecido que resulta en el análisis de las lesiones dentales. Conclusiones: se concluye que la evaluación penal de lesiones dentales era fuertemente subjetiva, lo que requiere más estudios y debates sobre el tema, con el fin de reducir al mínimo la subjetividad(AU)


Introduction: Article 129 of the Brazilian Penal Code defines the crime of bodily harm as damage to the physical integrity or the health of others. Penalties for this crime are graded in keeping with the consequences of the injury, determined by forensic examination indicated by the corresponding authority. Dental injuries are common in this type of examination, and analysis of results based on the Brazilian Penal Code is the object of frequent debate among forensic experts, with many divergences between the various examiners. Objective: Analyze the penal interpretation of injuries to upper front teeth provided by official forensic odontology experts from Nina Rodrigues Forensic Institute (Salvador, Bahia, Brazil). Methods: Analysis was conducted of 2 738 expert reports issued in the five-year period extending from January 2007 to December 2011. The inclusion criterion was description of injury to permanent upper front teeth, whereas the exclusion criterion was lack of certainty as to the consequences of the injury specified. Data were gathered by a single individual, who had access to the reports. The dental injuries described in the reports were classified and encoded to facilitate annotation and the performance of statistical studies based on chi-square estimation and the kappa test (R software version 2.15.2, R Core Development Team, 2012) (p≥ 0.05). Results: Of the 2 738 reports, 277 met the inclusion criterion. Of the injuries described therein, 32.16 percent were classified as simple dental crown fractures, 31.72 percent as complex fractures, and 36.12 percent as avulsions. Results show the close relationship between forensic experts and criminal investigators in the analysis of dental injuries. Conclusions: Penal assessment of dental injuries was markedly subjective, requiring further study and discussion to minimize such subjectivity(AU)


Assuntos
Humanos , Traumatismos Dentários/etiologia , Odontologia Legal/normas , Responsabilidade Penal , Estatística como Assunto/métodos
10.
J. appl. oral sci ; 26: e20170029, 2018. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-893704

RESUMO

Abstract Literature has reported positive results regarding the use of lasers in the control of erosive lesions; however, evaluating whether they are effective in the control of the progression of erosive/abrasive lesions is important. Objectives This study aimed to evaluate the effect of the Er:YAG laser irradiation in controlling the progression of erosion associated with abrasive lesions in enamel. Material and methods Bovine incisors were sectioned, flattened and polished. Forty-eight enamel slabs were subjected to treatment in an intraoral phase. Twelve volunteers used an intraoral appliance containing one slab that was irradiated with an Er:YAG laser (5.2 J/cm2, 85 mJ, 2 Hz) and another non-irradiated slab on each side of the appliance, during one phase of 5 d, under a split-mouth design. Devices were subjected to erosive challenges (1% citric acid, 5 min, 3 times a day) and abrasive challenges one h after (brushing force of 1.5 N for 15 s) randomly and independently on each side of the device. Measurements of enamel loss were performed via 3D optical profilometry (μm). We analyzed data using the Kruskal-Wallis and Mann-Whitney tests and morphological characteristics via scanning electron microscopy. Results Following erosive and abrasive challenges, the group that was irradiated with the Er:YAG laser presented less loss of structure than the non-irradiated group. The group that underwent erosion and irradiation did not exhibit a significant difference from the non-irradiated group. Conclusion Irradiation with the Er:YAG laser did not control the loss of structure of enamel subjected to erosion but did control abrasion after erosion.

11.
J Forensic Leg Med ; 52: 241-244, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-29040938

RESUMO

OBJECTIVES: Age estimation is important to set an anthropological profile in human remains, as well as in legal issues where the suspect or victim doesn't have documents that prove the real age. The age estimation, in adults, is a challenge, and it can be analyzed through some dental stages. This study aimed to test Olze's method in a Brazilian sample composed by adults, aged between 20 and 70 years old, both sex. METHODS: For experiments, 306 orthopantomography from Brazilian individuals between 20 and 70 years were selected. The dental involution through four different dental parameters were classified and the correlation between chronological age and the estimated age was examined by means of a multiple regression analysis. RESULTS: The results showed that up to 41 years old, the correlation between real age and the interval obtained was considered strongly positive (R = 0.8-1), and the percentage of matching was 78.78% for men and 71.21% for women. From 42 years old up, the correlation between real age and the estimation was considered null (R = 0) for both sex, and the percentage of matching was 17.24% for men and 6.89% for women. CONCLUSION: It could be concluded that the method is effective for age estimation up to 41 years old, but has limitations to be used over this age in Brazilian people.


Assuntos
Determinação da Idade pelos Dentes/métodos , Radiografia Panorâmica , Adulto , Idoso , Brasil , Cementogênese , Cemento Dentário/diagnóstico por imagem , Dentina/diagnóstico por imagem , Dentina/crescimento & desenvolvimento , Retração Gengival/diagnóstico por imagem , Humanos , Pessoa de Meia-Idade , Análise de Regressão , Atrito Dentário/diagnóstico por imagem , Adulto Jovem
12.
Dental Press J Orthod ; 22(2): 55-60, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28658356

RESUMO

OBJECTIVE:: The aim of this study was to assess in vitro the influence of the CO2 laser and of the type of ceramic bracket on the shear bond strength (SBS) to enamel. METHODS: : A total of 60 enamel test surfaces were obtained from bovine incisors and randomly assigned to two groups, according to the ceramic bracket used: Allure (A); Transcend (T). Each group was divided into 2 subgroups (n = 15): L, laser (10W, 3s); C, no laser, or control. Twenty-four hours after the bonding protocol using Transbond XT, SBS was tested at a crosshead speed of 0.5 mm/min in a universal testing machine. After debonding, the Adhesive Remnant Index (ARI) was evaluated at 10 x magnification and compared among the groups. Data were analyzed by one-way ANOVA, Tukey's, Mann-Whitney's and Kruskal-Wallis tests (α = 0.05). RESULTS: : Mean SBS in MPa were: AL = 0.88 ± 0.84; AC = 12.22 ± 3.45; TL = 12.10 ± 5.11; TC = 17.71 ± 6.16. ARI analysis showed that 73% of the specimens presented the entire adhesive remaining on the tooth surfaces (score 3). TC group presented significantly higher SBS than the other groups. The lased specimens showed significantly lower bond strength than the non-lased groups for both tested brackets. CONCLUSION: : CO2 laser irradiation decreased SBS values of the polycrystalline ceramic brackets, mainly Allure.


Assuntos
Cerâmica/efeitos da radiação , Colagem Dentária , Cimentos Dentários/efeitos da radiação , Lasers de Gás/efeitos adversos , Braquetes Ortodônticos , Resistência ao Cisalhamento/efeitos da radiação , Condicionamento Ácido do Dente , Animais , Bovinos , Esmalte Dentário , Análise do Estresse Dentário , Incisivo , Teste de Materiais , Cimentos de Resina/efeitos da radiação , Estresse Mecânico
13.
Dental press j. orthod. (Impr.) ; 22(2): 55-60, Mar.-Apr. 2017. tab, graf
Artigo em Inglês | LILACS | ID: biblio-840225

RESUMO

ABSTRACT OBJECTIVE: The aim of this study was to assess in vitro the influence of the CO2 laser and of the type of ceramic bracket on the shear bond strength (SBS) to enamel. METHODS: A total of 60 enamel test surfaces were obtained from bovine incisors and randomly assigned to two groups, according to the ceramic bracket used: Allure (A); Transcend (T). Each group was divided into 2 subgroups (n = 15): L, laser (10W, 3s); C, no laser, or control. Twenty-four hours after the bonding protocol using Transbond XT, SBS was tested at a crosshead speed of 0.5 mm/min in a universal testing machine. After debonding, the Adhesive Remnant Index (ARI) was evaluated at 10 x magnification and compared among the groups. Data were analyzed by one-way ANOVA, Tukey’s, Mann-Whitney’s and Kruskal-Wallis tests (α = 0.05). RESULTS: Mean SBS in MPa were: AL = 0.88 ± 0.84; AC = 12.22 ± 3.45; TL = 12.10 ± 5.11; TC = 17.71 ± 6.16. ARI analysis showed that 73% of the specimens presented the entire adhesive remaining on the tooth surfaces (score 3). TC group presented significantly higher SBS than the other groups. The lased specimens showed significantly lower bond strength than the non-lased groups for both tested brackets. CONCLUSION: CO2 laser irradiation decreased SBS values of the polycrystalline ceramic brackets, mainly Allure.


RESUMO OBJETIVO: o objetivo deste estudo foi avaliar in vitro a influência do laser de CO2 sobre a resistência ao cisalhamento da colagem (RCC) no esmalte dentário, usando diferentes tipos de braquetes cerâmicos. MÉTODOS: no total, 60 superfícies de esmalte de incisivos bovinos foram obtidas e aleatoriamente divididas em dois grupos, de acordo com o braquete cerâmico utilizado: Allure (A) e Transcend (T). Cada grupo foi dividido em dois subgrupos (n = 15): L, laser (10W, 3s); C, sem laser, ou controle. Vinte e quatro horas após a colagem dos braquetes com o sistema Transbond XT, foi realizado o teste de resistência ao cisalhamento, com velocidade de 0,5 mm/min, em máquina universal de ensaios mecânicos. Após a descolagem, o Índice de Remanescente de Adesivo (IRA) foi avaliado com aumento de 10X e comparado entre os grupos. Os dados foram analisados pelo ANOVA one-way, testes de Tukey’s, Mann-Whitney’s e Kruskal-Wallis (α = 0,05). RESULTADOS: as médias da RCC em MPa foram: AL = 0,88 ± 0,84; AC = 12,22 ± 3,45; TL = 12,10 ± 5,11; TC = 17,71 ± 6,16. A análise do IRA mostrou que 73% dos corpos de prova apresentaram todo o compósito remanescente aderido à superfície do esmalte (escore 3). O grupo TC apresentou valor significativamente maior de RCC do que os outros grupos. Os corpos de prova dos grupos com laser obtiveram valores adesivos significativamente menores do que os corpos de prova dos grupos sem laser, com ambos os tipos de braquetes. CONCLUSÃO: a irradiação com laser de CO2 diminuiu os valores de RCC dos braquetes policristalinos testados, principalmente do Allure.


Assuntos
Animais , Cerâmica/efeitos da radiação , Colagem Dentária , Braquetes Ortodônticos , Cimentos Dentários/efeitos da radiação , Resistência ao Cisalhamento/efeitos da radiação , Lasers de Gás/efeitos adversos , Estresse Mecânico , Condicionamento Ácido do Dente , Teste de Materiais , Bovinos , Cimentos de Resina/efeitos da radiação , Esmalte Dentário , Análise do Estresse Dentário , Incisivo
14.
Arch Oral Biol ; 75: 68-73, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28061390

RESUMO

OBJECTIVE: To assess the effect of chitosan, at concentrations of 2.5% and 5.0%, on the wettability of the eroded dentin, followed by analysis of surface morphology by SEM. METHODS: 104 bovine dentin slabs were ground, polished and then immersed in 20mL of citric acid (pH=3.2) under continuous stirring for 2h. Specimens were randomly divided according to the dentin substrate: sound and eroded, and then, subdivided into 4 groups (n=10): without rewetting (control), 1% acetic acid, 2.5% chitosan and 5.0% chitosan. Then, a drop of the adhesive system Single Bond 2 (3M) was deposited onto surface of each specimen. The contact angle between dentin surface and the adhesive system was measured by using a goniometer. The other 24 specimens were subjected to analysis under SEM. Statistical analysis was performed using the normality test (Kolmogorov-Smirnov) and Analysis of Variance (ANOVA) (p>0.05). RESULTS: No differences were found between the angles produced on the eroded dentin rewetting with chitosan at the concentrations of 2.5% and 5%. CONCLUSION: The chitosan, regardless of the concentration used, did not influence the eroded dentin wettability. Through SEM analysis, it was found particles of chitosan deposited on the surface and within the dentinal tubules.


Assuntos
Quitosana/farmacologia , Dentina/química , Erosão Dentária/patologia , Ácido Acético , Análise de Variância , Animais , Bis-Fenol A-Glicidil Metacrilato , Bovinos , Ácido Cítrico , Colagem Dentária , Dentina/diagnóstico por imagem , Dentina/patologia , Adesivos Dentinários/química , Incisivo/efeitos dos fármacos , Microscopia Eletrônica de Varredura , Erosão Dentária/induzido quimicamente , Erosão Dentária/diagnóstico por imagem , Molhabilidade/efeitos dos fármacos
15.
Clin Oral Investig ; 21(4): 1231-1241, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-27376544

RESUMO

OBJECTIVES: The objective of this study was to evaluate longitudinally the composite restorations, performed in cavities prepared by Er:YAG or conventional bur, and dentin re-wetting with water or chlorhexidine. MATERIALS AND METHODS: Twenty individuals with four active caries with cavitation reaching the dentin located on the occlusal surface of molars counterparts are selected. The teeth of each individual were randomly assigned into four groups: (I) Er:YAG laser (260 mJ/4 Hz) re-wetting with chlorhexidine, (II) Er:YAG laser (260 mJ/4 Hz) re-wetting with deionized water, (III) conventional method re-wetting with chlorhexidine, and (IV) conventional method re-wetting with deionized water. The teeth were isolated, prepared cavities, phosphoric acid etching, and re-wetting according to previously assigned method. Restoration was performed employing the Single Bond 2 and Z350XT resin. Clinical follow-up was held after the polishing of the restoration (baseline) and 6 and 12 months of the making of the restoration using the modified USPHS criteria. The restorations were qualitatively analyzed by means of photographs. In the evaluation period, replicas of the restorations were analyzed by SEM. Data were analyzed by statistics using chi-square test (p < 0.05). RESULTS: After 12 months of clinical evaluation, groups prepared with laser and re-wetting with chlorhexidine and water showed the lowest marginal staining value. There was no statistical difference between the groups for other factors. SEM analysis revealed that a non-expressive amount of restorations showed gaps and irregularities of tooth-restoration interface after 6 and 12 months compared to the baseline. CONCLUSION: The restorations performed in laser-prepared cavities, regardless of the re-wetting, presented the best clinical performance over the evaluated period. CLINICAL RELEVANCE: Laser-prepared teeth, regardless of re-wetting, showed greater resistance to marginal discoloration.


Assuntos
Resinas Compostas/química , Cárie Dentária/terapia , Preparo da Cavidade Dentária/métodos , Lasers de Estado Sólido/uso terapêutico , Condicionamento Ácido do Dente , Criança , Clorexidina/uso terapêutico , Cimentos Dentários , Feminino , Humanos , Cura Luminosa de Adesivos Dentários , Masculino , Microscopia Eletrônica de Varredura , Resultado do Tratamento , Água , Molhabilidade
16.
Acta Stomatol Croat ; 50(3): 215-221, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27847394

RESUMO

The purpose of this study was to evaluate dimensions of adult human maxillary sinuses on panoramic radiographs and their possible application on the sex determination for forensic purposes. The sample comprised 64 database panoramic radiographs from individuals aged 20 years or older (32 male and 32 female subjects), with complete permanent dentition (or absence of third molars). One examiner measured the width and height of the right and left maxillary sinuses using the software Image J 1.47v (National Institutes of Health, Bethesda, USA). Measurements were repeated to calculate intra-observer agreement. Chi-Square test, Kappa, ANOVA and T-Student were used for results analysis for p≤ 0.05. Intra-observer agreement with correlation Kappa ranged between 0.38 and 0.96. For female subjects, the mean height and width of the left maxillary sinus were 28.7856mm and 44.6178mm, respectively. And right maxillary sinus was 27.7163mm for height and 45.1850mm for width. Male subjects were found to have the mean height and width of the left maxillary sinus 30.9981mm and 48.7753mm, respectively. And right maxillary sinus was 30.7403mm for height and 48.5753mm for width. There was a statistically significant difference in the height and width of maxillary sinuses between males and females. It can be concluded that maxillary sinuses height and width on panoramic radiographs can be used to determine the gender of adult human subjects.

17.
Braz Dent J ; 27(4): 442-5, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27652708

RESUMO

This study evaluated the effect of matrix metalloproteinase (MMP) inhibitors - 2% (CHX) and sodium fluoride (NaF) (5000 ppm) - on microtensile bond strength (µTBS) of composite resin to Er:YAG laser-irradiated dentin after chemical degradation of the bond interface. The occlusal surface of forty sound human molars was removed exposing the dentin surface (n=10), which was polished, irradiated with Er:YAG laser, acid etched and dried. Twenty specimens were rewetted with 2% CHX (control group) and 20 were rewetted with NaF (5000 ppm). The adhesive system was applied and a 4-mm-high plateau of light-cured composite resin was built up. Resin-dentin sticks were obtained with a rectangular cross-sectional area (0.8-1 mm2) and were either stored in water at 37 ?#61616;C for 24 h or submitted to chemical degradation. For chemical degradation, they were immersed in 10% NaOCl aqueous solution for 5 h and rinsed in water for 1 h. The sticks were submitted to microtensile test in a mechanical testing machine at 0.5 mm/min until failure. Fracture pattern was analyzed using SEM. µTBS values were calculated in MPa and submitted to analysis of variance ANOVA (α=0.05). The variance analysis showed that the 'MMP inhibitor' and 'degradation' factors (p=0.214 and p=0.093, respectively) and interaction between the factors were not statistically significant (p=0.143). Mixed failure predominated in all groups. In conclusion, the 2% CHX and NaF 5000 ppm presented similar µTBS of composite resin to laser-irradiated dentin before and after chemical degradation.


Assuntos
Resinas Compostas , Lasers de Estado Sólido , Metaloproteases/efeitos dos fármacos , Inibidores de Proteases/farmacologia , Resistência à Tração , Metaloproteases/metabolismo
18.
Braz. dent. j ; 27(4): 442-445, July-Aug. 2016. tab, graf
Artigo em Inglês | LILACS | ID: lil-794610

RESUMO

Abstract This study evaluated the effect of matrix metalloproteinase (MMP) inhibitors - 2% (CHX) and sodium fluoride (NaF) (5000 ppm) - on microtensile bond strength (μTBS) of composite resin to Er:YAG laser-irradiated dentin after chemical degradation of the bond interface. The occlusal surface of forty sound human molars was removed exposing the dentin surface (n=10), which was polished, irradiated with Er:YAG laser, acid etched and dried. Twenty specimens were rewetted with 2% CHX (control group) and 20 were rewetted with NaF (5000 ppm). The adhesive system was applied and a 4-mm-high plateau of light-cured composite resin was built up. Resin-dentin sticks were obtained with a rectangular cross-sectional area (0.8-1 mm2) and were either stored in water at 37 ?#61616;C for 24 h or submitted to chemical degradation. For chemical degradation, they were immersed in 10% NaOCl aqueous solution for 5 h and rinsed in water for 1 h. The sticks were submitted to microtensile test in a mechanical testing machine at 0.5 mm/min until failure. Fracture pattern was analyzed using SEM. μTBS values were calculated in MPa and submitted to analysis of variance ANOVA (α=0.05). The variance analysis showed that the 'MMP inhibitor' and 'degradation' factors (p=0.214 and p=0.093, respectively) and interaction between the factors were not statistically significant (p=0.143). Mixed failure predominated in all groups. In conclusion, the 2% CHX and NaF 5000 ppm presented similar μTBS of composite resin to laser-irradiated dentin before and after chemical degradation.


Resumo Este estudo avaliou o efeito dos inibidores de metaloproteinase, clorexidina 2% e fluoreto de sódio (5000 ppm), na resistência de união entre a dentina irradiada por laser Er:YAG e a resina composta após a degradação química da interface de união. A superfície oclusal de quarenta molares humanos hígidos (n=10) foi removida expondo uma superfície de dentina, que foi polida, irradiada com laser Er:YAG, condicionada com ácido e seca. Vinte espécimes foram re-umedecidos com clorexidina 2% (Grupo controle) e 20 com fluoreto de sódio (5000 ppm). O sistema adesivo foi aplicado e um platô de resina composta fotopolimerizável de 4 mm de altura foi construído. Palitos de resina-dentina foram obtidos com secção transversal retangular (0,8-1 mm2). Eles foram armazenados em água (24 h a 37 ?#61616;C) ou submetidos a degradação química. Para a degradação química, foram imersos em solução aquosa de hipoclorito de sódio a 10% durante 5 horas e lavados em água durante 1 h. Os palitos foram submetidos ao teste de microtração em uma máquina de ensaios mecânicos a 0,5 mm/min até a fratura. O padrão de fratura foi analisado em MEV. Os valores de resistência de união foram calculados em MPa e submetidos à análise de variância ANOVA (α=0,05). A análise de variância mostrou que os fatores inibidor de metaloproteinases e degradação (p=0,214 e p=0,093, respectivamente), e a interação entre os fatores não foram estatisticamente significantes (p=0,143). A predominância de falha mista foi detectada para todos os grupos. Em conclusão, a clorexidina a 2% e fluoreto de sódio (ppm 5000) apresentaram resistência de união entre dentina irradiada e resina composta semelhante antes e após a degradação química.


Assuntos
Resinas Compostas , Lasers de Estado Sólido , Metaloproteases/efeitos dos fármacos , Inibidores de Proteases/farmacologia , Resistência à Tração , Metaloproteases/metabolismo
19.
Braz. dent. j ; 27(3): 309-312, May-June 2016. tab, graf
Artigo em Inglês | LILACS | ID: lil-782826

RESUMO

Abstract Dental sealants are important for prevention of carious lesions, if they have good shear strength. The aim of this study was to evaluate the shear bond strength (SBS) of two sealants to saliva-contaminated and non-contaminated enamel with and without an intermediate adhesive layer underneath the sealant. Ninety flat enamel surfaces from human third molars were randomly assigned to 6 groups (n=15): F (control): Fluroshield(tm) sealant; EWB (control): Embrace(tm) WetBond(tm); SB/F: Single Bond adhesive system + F; SB/EWB, s-SB/F and s-SB/EWB. In the s-SB/F and s-SB/EWB groups, the acid-etched enamel was contaminated with 0.01 mL of fresh human saliva for 20 s. Sealant cylinders were bonded to enamel surface with and without an intermediate adhesive system layer. The shear tests were performed using a universal testing machine (0.5 mm/min). Data were analyzed statistically by Kruskal-Wallis and Mann-Whitney tests (α=0.05). F presented higher mean SBS than EWB in all experimental conditions. The lowest SBS mean was obtained for EWB on contaminated enamel (p<0.05). In conclusion, an adhesive system layer should be used prior to sealant placement, in both dry and saliva-contaminated enamel. F had the best performance in all experimental conditions. EWB sealant showed very low results, but an adhesive layer underneath the sealant increased its SBS even after salivary contamination.


Resumo Selantes dentários são importantes para a prevenção de lesões de cárie desde que tenham boa resistência ao cisalhamento. O objetivo deste trabalho foi avaliar a resistência ao cisalhamento (SBS), de dois selantes em esmalte contaminado e não contaminado com saliva, com e sem uma camada adesiva intermediária sob o selante. Noventa superfícies de esmalte de terceiros molares humanos foram planificadas e divididas aleatoriamente em 6 grupos (n=15): F (controle): selante Fluroshield(tm); EWB (controle): Embrace(tm) WetBond(tm); SB/F: sistema adesivo Single Bond + F; SB/EWB, s-SB/F and s-SB/EWB. Nos grupos s-SB/F e s-SB/EWB, a contaminação do esmalte condicionado foi obtida com 0,01 mL de saliva humana fresca durante 20 s. Cilindros de selante foram colocados sobre a superfície do esmalte com e sem uma camada de sistema adesivo intermediária. Os ensaios de cisalhamento foram realizados utilizando uma máquina universal de ensaios (0,5 mm/min). Os dados foram analisados estatisticamente pelo teste de Kruskal-Wallis e Mann-Whitney (?#61537;=0,05). F apresentou valores médios de SBS maiores do que EWB em todas as condições experimentais. O menor valor médio de SBS foi obtido pelo EWB em esmalte contaminado (p<0,05). Em conclusão, uma camada de sistema de adesivo deve ser utilizada antes da colocação do selante, tanto em superfície seca quanto contaminada por saliva. F teve o melhor desempenho em todas as condições experimentais. O selante EWB apresentou resultados insatisfatórios, porém o uso de uma camada adesiva abaixo do selante aumentou sua SBS, mesmo após a contaminação salivar.


Assuntos
Humanos , Colagem Dentária , Selantes de Fossas e Fissuras , Saliva/química , Compostos Benzidrílicos , Fenóis
20.
Braz Dent J ; 27(3): 309-12, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27224565

RESUMO

Dental sealants are important for prevention of carious lesions, if they have good shear strength. The aim of this study was to evaluate the shear bond strength (SBS) of two sealants to saliva-contaminated and non-contaminated enamel with and without an intermediate adhesive layer underneath the sealant. Ninety flat enamel surfaces from human third molars were randomly assigned to 6 groups (n=15): F (control): Fluroshield(tm) sealant; EWB (control): Embrace(tm) WetBond(tm); SB/F: Single Bond adhesive system + F; SB/EWB, s-SB/F and s-SB/EWB. In the s-SB/F and s-SB/EWB groups, the acid-etched enamel was contaminated with 0.01 mL of fresh human saliva for 20 s. Sealant cylinders were bonded to enamel surface with and without an intermediate adhesive system layer. The shear tests were performed using a universal testing machine (0.5 mm/min). Data were analyzed statistically by Kruskal-Wallis and Mann-Whitney tests (α=0.05). F presented higher mean SBS than EWB in all experimental conditions. The lowest SBS mean was obtained for EWB on contaminated enamel (p<0.05). In conclusion, an adhesive system layer should be used prior to sealant placement, in both dry and saliva-contaminated enamel. F had the best performance in all experimental conditions. EWB sealant showed very low results, but an adhesive layer underneath the sealant increased its SBS even after salivary contamination.


Assuntos
Colagem Dentária , Selantes de Fossas e Fissuras , Saliva/química , Compostos Benzidrílicos , Humanos , Fenóis
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