Avaliação das propriedades ópticas de uma cerâmica e de um compósito, com e sem polimento, submetidos a meios e tempos de imersão distintos.

Detalhes bibliográficos
Ano de defesa: 2013
Autor(a) principal: Dellazzana, Fernando Zurlo
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
BR
Odontologia
UFSM
Programa de Pós-Graduação em Ciências Odontológicas
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/6125
Resumo: The aim of this study was to verify the color and opacity of a ceramic system (IPS e.max Ceram - Ivoclar Vivadent) and an indirect composite resin (SR Adoro Ivoclar Vivadent), with and without polishing, when stored in different media (immersed in water and red wine. Thirty-six test specimens (sp) 12mm in diameter and 2mm thick were built for each material. Immediately after ceramic sintering, and polishing of the composite, half the sp of each material were polished with a polishing system (OptraFine P Disc - Ivoclar Vivadent), washed in water and dried with gauze. The other half of the sp remained unpolished. Initial color and Percentage of Opacity were measured with a spectrophotometer (SP60 - X-Rite), using the CIE L* a* b* system. The sp of each material were divided into groups (n=9) according to the storage media (water and red wine). Color readings were performed at the time intervals of 7 and 30 days. Color alteration (ΔE) and percentage of opacity were calculated for each time interval and the data were submitted to statistical analysis (5%). When the composite, irrespective of polishing, was immersed in water, its �E increased after 30 days storage in water, whereas for IPS e.max, changes were observed only with polishing. However, after 7 days of immersion in red wine, SR Adoro with polishing presented changes, which seemed to continue increasing after 30 days, and also without polishing. IPS e.max presented greater color changes in 30 days with and without polishing in comparison with 7 days. IPS e.max showed greater opacity than SR Adoro. In SR Adoro there is variation in opacity over the course of immersion time in wine, whereas in IPS e.max, there was no change in opacity.