The influence of composite resins fluorescence intensity in the retreatment of direct veneers using different removal methods

• Autor(a) principal: Santos, Giovana Maria Zeine dos [UNESP]
• Data de Publicação: 2024
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: https://hdl.handle.net/11449/255019
• topic: Resinas compostas; Fluorescencia; Restaurações (Odontologia); Composite resin

During the retreatment of direct veneers, the dental surgeon finds it difficult to remove all the restorative material without causing unnecessary wear to the healthy tooth structure. For this reason, this laboratory study evaluated the influence of fluorescence intensity of composite resins on additional tooth wear or presence of restorative material in different dental thirds during retreatment of direct veneers. Sixty bovine incisors had their crowns dimensions reduced to 10x8mm. Teeth were divided according to fluorescence intensity of composites: low-L (TPH spectrum), medium-M (Opallis) and high-H (Essentia). Teeth were divided according to removal methods: conventional-CON and fluorescence-aided identification technique-FIT. Specimens were scanned (T0), received veneer preparation and were scanned again (T1). After restorations, composite was removed, and teeth were scanned (T2). Measurements between T1 and T2 were performed for: additional wear, presence of residues areas, average between additional wear and presence of residues. Kruskal Wallis, Mann-Whitney, Friedman, two-way ANOVA, and post-Tukey tests were performed (α<0.05). Comparing composite resins, smaller area of additional wear and greater residues presence was found for H compared to L for both techniques, in cervical third. Comparing removal methods, FIT presented greater additional wear than CON for L and M, in middle and cervical thirds. Incisal presented greater additional wear than other thirds. It was concluded that composite resin with high fluorescence intensity removed with FIT promoted less tooth wear. Incisal third was the most affected in direct veneer removal procedures.