EVALUATION OF COLOR FIDELITY BETWEEN TRY-IN CEMENTS AND RESIN CEMENTS: A LITERATURE REVIEW

Abstract

Anterior teeth are of fundamental importance in facial esthetics and, therefore, are extremely valued by patients who wish to lighten, enlarge, improve their anatomy or position, in search of a more natural and harmonious smile. The laminated veneers managed to combine the conservative requirement of their preparations with their qualities of resistance, biocompatibility and, above all, unequaled aesthetics. One of the reasons for failures in the laminated veneer technique is the choice of cementing agent color. To facilitate color choice, manufacturers offer tubes of cement for color testing, so-called "try-in" cements. So, knowing if these are reliable in relation to the final shade of a restoration is a very important factor in an aesthetic treatment that uses laminated veneers. Thus, the objective of this work was to evaluate the color fidelity between try-in cements and their respective resin cements in the final restorative result of veneers / dental contact lenses, analyzing whether the thickness of the ceramic veneer influences the color agreement between the test pastes and resin cements, and observing whether the shade of the try-in pastes agrees with that of the respective resin cements, which may result in a difference in the final shade of the restoration. A literature review was carried out in the PubMed, Scielo and Wiley Library databases, using the descriptors “try-in pastes”, “resin luting cement”, “laminate veneers” and “color perception tests”. Articles were searched between 1977 and 2019. This review presents the latest in the literature on the color fidelity of try-in cements and, for the most part, the authors conclude that there are color differences between the test pastes and their respective resin cements. It can be concluded that there was no color agreement between the test pastes and resin cements in most of the articles studied. The thickness of the ceramic and the differences in shades between try-in and resin cements influenced the final aesthetic result. Therefore, it can be stated that it is important that the color agreement between the test pastes and their resin cements is carefully analyzed, and that more studies are carried out, in order to contribute to a favorable aesthetic clinical result.

Keywords: Try-in pastes; Resin cement; Laminate veneers; Color perception tests.