Efeito da fonte de luz de alta intensidade na contração pós-gel em resinas de polimerização rápida: análise por extensometria elétrica

• Autor(a) principal: Cruz, Matheus Ribeiro da
• Data de Publicação: 2024
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFU
• Texto Completo: https://repositorio.ufu.br/handle/123456789/43372
• topic: Resinas Compostas; Polimerização de Resinas Dentárias; Contração de Polimerização; Falha de Restauração Dentária; Composite Resins; Dental Resin Polymerization; Polymerization Shrinkage; Dental Restoration Failure; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::MATERIAIS ODONTOLOGICOS

The aim of this study was to evaluate the effect of the photopolymerization technique on the post-gel shrinkage of composite resins. The study was developed using a polywave LED light source (Bluephase Powercure – Ivoclare Vivadent, Schaan, Liechtenstein). Two types of resin composite were used: 1. conventional bulk fill (Tetric N-Ceram Bulk Fill – Ivoclare Vivadent, Schaan, Liechtenstein); and 2. ultra-fast curing bulk fill (Tetric Powerfill – Ivoclare Vivadent, Schaan, Liechtenstein). The materials were cured according to the manufacturer's instructions: 20s at the high-power mode (Tetric N-Ceram) and 3s at the maximum power (Tetric Powerfill). The linear post-gel shrinkage was obtained by extensiometry (n=5). The tip of the light source was kept 1 mm away from the composite surface and the deformation values were collected for 5 min. Data analysis was performed with a significance level of 5%. One-way ANOVA and Tukey's tests were used. Regarding the results obtained, it was found that the tested resins demonstrated a significant difference in post-gel contraction (p=0.032), with the ultra-fast polymerization resin presenting the lowest values.