Clinical Evaluation of Composite Resin Restorations in Posterior Teeth

AbstractFactors such as aesthetics and adhesion to dental substrates have consolidated composite resin as a restorative material for posterior teeth, however, the performance is unsatisfactory regarding the longevity of these restorations. The purpose of this retrospective cross-sectional observational study was to evaluate the reasons that resulted in failure of class I and II Black composite resin restorations, performed by undergraduate dental students at the State University of Londrina. The patients were selected from the research of the medical charts filed at the University Dental Clinic's Screening Department. The restorations were evaluated by two calibrated dentists. The data collected were tabulated and analyzed using descriptive statistics, function Cont IF. Of the 261 class I and II restorations evaluated, 150 (57.5%) were in need of replacement. The main causes of failure of class I and II restorations were secondary caries (46.7%), followed by fracture (19.3%) and loss of marginal adaptation (16.7%). Of all the restorations made by the 3rd grade students, 68.4% failed, 57.4% performed by the 4th grade students and 53.9% of the 5th grade students. Based on the results, it is concluded that the main reasons for restorations failure were secondary caries, fracture and loss of marginal adaptation according to the evaluation criteria. Restorations performed by students in the 3rd grade showed a higher percentage of failures compared to those performed by students in the 4th and 5th grades. Keywords: Permanent Dental Restoration. Composite Resins. Dental Restoration Failure. Resumo Fatores como estetica e adesao aos substratos dentarios tem consolidado a resina composta como material restaurador para dentes posteriores, entretanto, o desempenho mostra-se insatisfatorio em relacao a longevidade destas restauracoes. O objetivo desse estudo observacional transversal retrospectivo foi avaliar as razoes que resultaram em falhas das restauracoes de resina composta de classe I e II de Black, realizadas por alunos de graduacao em Odontologia da Universidade Estadual de Londrina. Os pacientes foram selecionados a partir da pesquisa dos prontuarios arquivados no Setor de Triagem da Clinica Odontologica Universitaria. As restauracoes foram avaliadas por dois avaliadores, cirurgioes-dentistas, calibrados. Os dados coletados foram tabulados e analisados por meio de estatistica descritiva, funcao Cont SE. Das 261 restauracoes classes I e II avaliadas, 150 (57,5%) apresentavam-se com necessidade de substituicao. As principais causas de falhas das restauracoes classes I e II foram: carie secundaria (46,7%), seguido de fratura (19,3%) e perda de integridade marginal (16,7%). Dentre as restauracoes realizadas por alunos da 3a serie e avaliadas, 68,4% falharam, da 4a serie 57,4% e da 5a serie 53,9%. Com base nos resultados, conclui-se que as principais razoes de falha das restauracoes foram carie secundaria, fratura e perda de integridade marginal, de acordo com os criterios de avaliacao. As restauracoes realizadas por alunos da 3a serie apresentaram maior percentual de falhas, comparadas as realizadas pelos alunos da 4a e 5a series. Palavras-chave: Restauracao Dentaria Permanente. Resinas Compostas. Falha de Restauracao Dentaria.