Effect of Thickness and Brand of Metal Ceramic Porcelain on Color

摘要

An essential aspect of any successful metal ceramic restoration is to provide anacceptable shade match to adjacent teeth or restorations. Generally, the dentist will select a shade from a prefabricated shade guide and write a work order for the lab to match that shade with the metal ceramic restoration. Two of the many factors that can affect the ultimate shade of a metal ceramic restoration are the brand of porcelain and the thickness of dentin porcelain used in the final restoration. This investigation was designed to examine the effects of thickness and brand on the shade of dentin porcelain. Two hundred eighty-eight metal ceramic specimens were made using a custom shade tab device. Three Vita Lumin shades (A3.5, B1, and C3) of three commercially available dental porcelains that reportedly use shade-matched opaques (Microbond, Ceramco II, and Jelenko) and one commercially available dental porcelain that does not use shade-matched opaques (Vita VMK 68) were used to make six specimens in each of four thicknesses (0.3 mm opaque only, and 0.3, 0.6, and 0.9 mm of dentin porcelain).