Color stability and translucency of ceramic laminate veneer restoration for diastema closure: Effect of laminate veneering materials and resin cements

Abstract

Objective To investigate the effect of resin cements on color stability and translucency of ceramic laminate veneer materials used for diastema closure. Materials and Methods Sixty resin abutments were prepared for ceramic veneers and divided into six groups according to the ceramic type (lithium disilicate, zirconia reinforced lithium silicate, and translucent zirconia) and cement type (Variolink Esthetic LC and RelyX Veneer). The color coordinates and translucency were analyzed after cementation and after immersion in coffee solution. The differences in color and translucency were estimated, and the results were statistically assessed (α = .05). Results Ceramic materials showed a significant impact on the color changes after coffee immersion within Variolink Esthetic groups. Zirconia showed the highest color change, followed by zirconia reinforced lithium silicate and lithium disilicate. The ceramic materials showed a significant impact among the RelyX Veneer groups. A significant interaction in color changes between ceramic type and cement type after cementation, and after coffee immersion were found. All groups showed a clinically acceptable difference in translucency parameters after coffee immersion. Conclusions Cement selection is important for the color stability and translucency of ceramic laminate veneers after coffee immersion. Lithium disilicate veneer is more resistant to coffee staining than zirconia reinforced lithium silicate and zirconia veneers. Ceramic laminate veneers cemented with resin cement contain benzoyl germanium compounds (Variolink Esthetic) are more translucency. However, ceramic laminate veneers cemented using resin cement contain iodonium salts (RelyX Veneer) are more resistant to coffee immersion.