Opalescência dos materiais restauradores e propriedades ópticas do dente humano uma revisão de literatura

Abstract

The use of restorative materials and techniques to reproduce the optical characteristics of teeth provides a more aesthetic and natural restoration. The aim of this study was to review the literature about the opale scence of composite resins in comparison to the optical properties of the human tooth and dental ceramics. For this purpose, a search was performed on the Pubmed database, with the descriptors "tooth" and "opalescence", and their respective "entry terms", without language and year restriction. The search was complemented by Google Scholar and the Scielo database. It was observed that the methodology used in the research can influence the results obtained, making it difficult to compare the studies. Consider ing the space of colors L * a * b * or CIELAB, it is verified that the parameter of opalescence of the materials depends on the coordinates aR *, aT *, bR * and bT *, being that the value of bT * is the most influence on results. In addition to the direct materials, there are studies demonstrating that dental ceramics have similar optical properties to the natural tooth and that the composition of the glass matrix and the finishing and polishing of the part influence the final result. The opalescence is onl y one of the characteristics that must be considered to achieve a final esthetic result with excellence. It was concluded that the restorative materials presented distinct opalescence to the tooth. The clinical applicability of the opalescence parameter fo r material selection is questionable.