Factors afeting marginal staining and surfasse staining of composite restoratios in anterior teeth

Esthetic restorative procedures with composite resins are carried out daily in the dental practice, but few studies reported on the clinical longevity of these restorations. The purpose of this study was to evaluate the factors that influence marginal and surface staining of resin composite restorations placed in anterior teeth, including: the type of composite resin and adhesive system used, the presence or absence of bevel in the preparation and implementation of a hydrosoluble gel in the last resin layer. From the analysis of the files of the Internship Course in Dental Clinics Activities of the Graduate Program in Dentistry from the Federal University of Pelotas, in the period from 2013 to 2014, 52 patients were invited. Thisty-three patients took part in the study, and 69 restorations (Class IV, Class III and direct veneer) were evaluated according to the clinical evaluation criteria for restorations’ evaluation proposed by the FDI (World Dental Federation). Retrieved data were tabulated and statistically analyzed using Stata version 11.0. Survival analyzes were performed using the Kaplan-Meier method, to obtain the survival functions for the variables of interest, followed by the log-rank test for comparison between groups (p <0.05). Out of the 69 evaluated restorations, only 4 restorations failed due to aesthetic issues. Restorations placed on cavity preparations with bevel at the cavo-surface angle showed better results in relation to marginal staining than those who have not been placed in beveled cavity preparation (p=0.002). Class IV restorations showed the highest number of failures (p=0.024). Although both types of composite resin were clinically acceptable, there was statistically significant difference between resins for marginal staining (p=0.05), where qualitatively the Empress had better scores than the Z-350.The type of adhesive system (p=0.476) and the application or not water-soluble gel showed no significant difference (p=0.651). The results of this study revealed that the restorations were acceptable after one year of clinical follow-up, but restorations that were placed in beveled cavity preparation performed better regarding the marginal staining.Sem bolsaProcedimentos restauradores estéticos de resina composta são confeccionados diariamente nos consultórios odontológicos, porém poucos estudos reportam o acompanhamento clínico da longevidade destas restaurações. O intuito deste estudo foi avaliar fatores que influenciam no manchamento superficial e marginal de restaurações de resina composta realizadas em dentes anteriores, dentre eles: o tipo de resina composta e sistema adesivo utilizado, a confecção ou ausência de bisel no preparo e a aplicação de um gel hidrossolúvel na última camada de resina. A partir da análise dos prontuários da Disciplina de Estágio em Atividades Clínicas Odontológicas do Programa de Pós-Graduação em Odontologia da Universidade Federal de Pelotas, entre o período de 2013 a 2014, 52 pacientes foram convidados a participar do estudo. Aceitaram participar 33 pacientes, que receberam 69 restaurações estéticas (Classe IV, Classe III e Faceta). As restaurações foram avaliadas de acordo com os critérios de avaliação clínica de restaurações propostos pela FDI (Federação Dentária Internacional). Os dados obtidos foram tabulados e submetidos à análise estatística usando o Stata versão 11.0. As análises de sobrevida foram realizadas pelo método Kaplan-Meier, para obtenção das curvas de sobrevida para as variáveis de interesse, seguido pelo teste Log-Rank, para comparação entre os grupos (p