Color Modification of Porcelain Laminate Veneer Crowns by CCM. Part 1. Color Reproducibility using the Musking Porcelain with Opaque as a Coloring Element.

Porcelain laminate veneer crown is an excellent system to improve the color of a discolored tooth in the anterior region having occlusal contact. Since masking porcelain of porcelain laminate veneer crown has opacity for hiding the discolored tooth, it was difficult to give a high translucency to the laminate crowns by conventional methods.The purpose of this study was to produce the natural color and excellent appearance of laminate crowns with adequate translucency using the Computer Color Matching (CCM) System to compensate opacity of masking porcelain.Construction of CCM sample, discolored layer, and procedure of CCM formulation are the same as part 1.In this study, 1 kind of opaque porcelain was used as the hiding element, and 3 kinds of dentin were used as the coloring element. According to the CCM formulation, masking porcelain was baked and the CCM samples were made.In comparison of the target color and CCM sample, both reflectance curves were very similar and color difference dE was under 3.0. Furtheremore, CCM samples showed the color to be indistinguishable from the target color by the naked eye.