Confiabilidade de um método in vitro para avaliação da alteração de cor de dentes naturais

• Ano de defesa: 2014
• Autor(a) principal: Faria, Adriana Alves de [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Reprodutibilidade dos testes; Cor; Esmalte dentário; Dentina; Dental enamel
• Link de acesso: http://hdl.handle.net/11449/145484; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/13-10-2016/000867947.pdf

The tooth color is considered a complex phenomenon and a growing number of studies have investigated ways of evaluating color in order to make this procedure more precise and objective. This study evaluated the reliability of the spectrophotometer measurements for color analysis in vitro on bovine enamel and dentin. It was a laboratory double-blind trial and the dependent variables were the colorimetric coordinates L*, a* and b*. These measurements were performed by a single examiner at two different times. 100 bovine teeth were used for each type of surface (enamel and dentin). Bland-Altman plots were used to analyze agreement. Intra-examiner reproducibility of the measurements was estimated by the Intraclass Correlation Coefficient (ICC) and its confidence interval (CI95%). Intra-examiner reliability showed ICC values classified as Very Good (ICC ≥ 0.91) for all coordinates in both types of specimens, with the exception of coordinated a* in enamel, which was considered Good (0,71 ≤CCI> 0.91). It was observed that the L* readings showed less agreement between measurements, followed by the coordinate b* and a*. For L* and b* parameters, limits of agreement were wider in dentin. We conclude that the technique used for measuring color in enamel and dentin of bovine teeth showed adequate reliability, but it is suggested that studies in this area should standardize the samples and perform calibration before the readings.