Resumo Introdução No Brasil, o traumatismo dentário (TD) é considerado um problema de saúde pública. No entanto, poucos estudos na literatura relatam a prevalência de TD em pessoas com deficiência (PD). Objetivo O objetivo deste trabalho foi avaliar a prevalência de TD em PD atendidas na Clínica de Pacientes Especiais da Universidade Católica de Brasília (COPE). Material e método Este estudo seguiu um delineamento descritivo e retrospectivo, e foi realizado por meio da análise de 73 prontuários de PD atendidas na COPE entre 2014 e 2016. Foram coletados dados sociodemográficos e clínicos. O teste t foi utilizado entre as proporções para determinar se houve diferenças significativas entre as categorias das variáveis analisadas. O programa “Statistical Package for Social Sciences” (SPSS), versão 23.0 (IBM Corporation, Armonk, NY, EUA) foi utilizado nas análises (p<0,05). Resultado Encontrou-se uma prevalência de TD de 33/73 (45,2%) entre os PD. A fratura predominante foi a do tipo coronária, com uma frequência de 26/33 (78,8%). A maioria dos pacientes tinha acima de 20 anos, com uma frequência de 63/73 (86,3%), significativamente maior do que as frequências das outras categorias (p < 0,008). Os pacientes da amostra apresentavam doenças variadas, sendo as mais prevalentes as das categorias mental, com frequência de 22/73 (30,1%), múltipla com 19/73 (26%), e sistêmica com 14/73 (19,2%). Conclusão Foi encontrada uma alta prevalência de TD em PD, sendo a maioria dos casos relacionados a doenças mentais e múltiplas. Futuras pesquisas são necessárias para avaliar a prevalência de TD nesse grupo de pacientes em todo o Distrito Federal.

Abstract Introduction In Brazil, dental trauma (DT) is considered a public health problem. However, few studies in the literature report the prevalence of DT in disabled persons (DP). Objective The aim of this study was to assess the prevalence of DT among DP seen at the Dental Clinic for Special-Needs Patients (COPE) of the Catholic University of Brasília. Material and method A retrospective, descriptive study analyzing 73 medical charts of DP seen at the COPE between 2014 and 2016 was conducted. Clinical and sociodemographic data were collected. The t-test was used to check for significant differences between the categories of the variables analyzed. The Statistical Package for Social Sciences (SPSS), version 23.0 (IBM Corporation, Armonk, NY, USA) was used for all statistical analyses (p < 0.05). Result A DT prevalence of 33/73 (45.2%) was found among DP. The predominant type of fracture was crown fracture (26/33-78.8%). The majority of patients were over 20 years old (63/73 - 86.3%), at a proportion significantly higher than those for the other age categories (p < 0.008). The patients in the sample had a variety of diseases, predominantly in the following categories: mental (22/73- 30.1%), multiple (19/73-26%), and systemic (14/73-19.2%). Conclusion A high prevalence of DT was found in DP, with the majority of cases being related to mental and multiple diseases. Further research is needed to assess the prevalence of DT in this patient group throughout the Federal District.

This study evaluated the influence of solvent evaporation conditions of acid-etching adhesives. The medium dentin of thirty extracted human third molars was exposed and bonded to different types of etch-and-rinse adhesives: 1) Scotchbond Multi-Purpose (SBMP) ; water-based; 2) Adper Single Bond 2 (SB) ; ethanol/water-based, and 3) Prime & Bond 2.1 (PB) ; acetone-based. Solvents were evaporated at air-drying temperatures of 21ºC or 38ºC. Composite buildups were incrementally constructed. After storage in water for 24 h at 37ºC, the specimens were prepared for bond strength testing. Data were analyzed by two-way ANOVA and Tukey's test (5%). SBMP performed better when the solvents were evaporated at a higher temperature (p < 0.05). Higher temperatures did not affect the performance of SB or PB. Bond strength at room temperature was material-dependent, and air-drying temperatures affected bonding of the water-based, acid-etching adhesive.

This study examined the immediate bond strength of etch-and-rinse adhesives to demineralized dentin saturated with either water or absolute ethanol. The research hypothesis was that there would be no difference in bond strength to dentin between water or ethanol wet-bonding techniques. The medium dentin of 20 third molars was exposed (n = 5). The dentin surface was then acid-etched, left moist and randomly assigned to be saturated via either water wet-bonding (WBT) or absolute ethanol wet-bonding (EBT). The specimens were then treated with one of the following etch-and-rinse adhesive systems: a 3-step, water-based system (Adper Scotchbond Multipurpose, or SBMP) or a 2-step, ethanol/water-based system (Adper Single Bond 2, or SB). Resin composite build-ups were then incrementally constructed. After water storage for 24 h at 37°C, the tensile strength of the specimens was tested in a universal testing machine (0.5 mm/min). Data were analyzed by two-way ANOVA and Tukey's test (a = 5%). The failure modes were verified using a stereomicroscope (40'). For both adhesives, no significant difference in bond strength was observed between WBT and EBT (p > 0.05). The highest bond strength was observed for SB, regardless of the bonding technique (p < 0.05). No significant interaction between adhesives and bonding techniques was noticed (p = 0.597). There was a predominance of adhesive failures for all tested groups. The EBT and WBT displayed similar immediate bond strength means for both adhesives. The SB adhesive exhibited higher means for all conditions tested. Further investigations are needed to evaluate long-term bonding to dentin mediated by commercial etch-and-rinse adhesives using the EBT approach.