Avaliação de microdureza de superfície de dois tipos de resina composta após ciclagem ácida
INTRODUCTION: Dental erosion is a type of mineral loss caused by acids of non-bacterial origin, and there may be a need for restoring the affected teeth. The correct choice of restorative material aims to achieve longevity of the restoration in the face of environments with frequent pH drops. At the...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/39275 |
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| Resumo: | INTRODUCTION: Dental erosion is a type of mineral loss caused by acids of non-bacterial origin, and there may be a need for restoring the affected teeth. The correct choice of restorative material aims to achieve longevity of the restoration in the face of environments with frequent pH drops. At the same time, bulk fill resins came up with the proposal to reduce the clinical time. OBJECTIVE: This study aimed to evaluate the surface microhardness of a bulk fill resin and a conventional composite resin through the analysis of surface microhardness after acid cycling. MATERIALS AND METHODS: Matrices of 2mm of resin types were made (n = 10) and after analysis of initial surface microhardness, they were immersed in different solutions, constituting two groups (distilled water and orange juice). New analyzes of surface microhardness were performed at 24h, 7, 14 and 28 days. The data obtained were analyzed according to the ANOVA test with three criteria, followed by Tukey's post-tests. RESULTS: The bulk fill resin underwent a significant reduction in the microhardness values in both liquids tested and had significantly lower values when compared to the conventional resin. There was no significant difference between the liquids evaluated. CONCLUSIONS: There was a reduction in the values of surface microhardness in the two resin groups studied and in each immersion liquid tested, with the reduction observed in the conventional resin group being smaller when compared to the bulk fill.MAIA |
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