Influência de diferentes tipos de fotopolimerizadores e fotoiniciadores na rugosidade e brilho de resinas compostas, frente a diferentes desafios

• Autor(a) principal: Carvalho, Karina Andrade [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/155317; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-04-28/000881610.pdf
• topic: Fotoiniciadores dentários; Resinas compostas; Luzes de cura dentária; Photoinitiators, Dental

Recently, a new generation of LED was released in the dental market called third generation LED devices with multiple wavelengths. Therefore, the objective of this study was to evaluate the surface roughness and gloss of resin composites for bleached teeth, using two types of LED before and after brushing and HCL immersion. Three resin composites were selected: Filtek Z350XT (3M ESPE, color WD), a composite resin which uses camphorquinone as photoinitiator; Tetric N-Ceram (Ivoclar Vivadent, color A1) that have in their composition the photoinitiator lucirin-TPO and Vit-l-escence (Ultradent Products, color WO); that have in theis composition the canforoquinona, amina and lucerina-TPO. One hundred and eighty disc shaped specimens were made with dimensions of5 mm in diameter and 1.5mm thick. Sixty disks was photopolymerized by a LED apparatus of one wavelength (Poly Wireless, Kavo) and the remnants was photopolymerized with a LED with several wavelengths (Valo, Ultradent), using two application modes. Initial analysis of surface roughness and gloss was made. The specimens werw exposed to different challenges: brushing and HLC immersion. Then, surface roughness and gloss were analyzed again. The mean values of roughness and gloss were evaluated by analysis of variance (ANOVA) 3 criteria, repeated measures. The Tukey test was used for multiple comparisons. The level of significance was 5%. After the two proposed challenges, there was only influence of the curing light to Filtek Z350XT resin, and the Valo in standard mode had the lowest roughness (p≤0,05). Considering the variation of roughness, with Valo x-power, all resins had a significant increase in roughness after brushing (p≤0,05). Only Tetric-N-Ceram resin light-cured with Kavo and Vit-L-escence photoactivated by Valo in x-power mode showed increased roughness after immersion in HCl with a statistically...