Color Stability of Composite and Ceramic Veneers over a period of 1 year

Abstract

Color stability of any material is affected by two factors- namely intrinsic and extrinsic. For dental ceramics, amongst the various factors, the variables in the control of the operator include the glaze layer, the diet of the patient and oral hygiene aids.The aim of the study is to evaluate the effect of different staining solutions on ceramic restorations based on the glaze layer.A pictorial survey was  carried out amongst 100 dentists evaluating the outcomes of composite veneers v/s ceramic veneers. This was followed by an in-vitro evaluation of the color stability of composite discs (z350xt) and ceramic discs( CEREC and Emax) after placing in 4 solutions. Finally, an in-vivo evaluation of the color stability of the restorations– Composite and Ceramic veneers was done with a 1 year follow up period. The highest ?E values in the CEREC CAD  and IPS Emax CAD group was observed in the group where the glazed, trimmed, polished discs were exposed to the turmeric solution. The b value of the composite samples significantly increased over 1 year in the in-vitro and the in-vivo observation. Color stability of composite veneers is lower than ceramic veneers (?E <3.7). However, it is clinically acceptable at 1 .The color stability of highly polished nano-clustered composite resin shows comparable results to ceramic veneers, but needs regular maintenance.