The influence of translucent surface layer thickness on shade correction of an anterior resin composite restorative material

Abstract

This study was conducted to evaluate the effect of the thickness of the surface layer (0.25, 0.50, 0.75 and 1 mm) applied over two different shades of opaque resin composite on a shade correction of a standard O3TN shade. A total of 40 composite discs of 10 mm diameter and 2.5 mm thickness were prepared. The specimens were divided according to two factors: the opaque shades (O2 and O4) and the thickness of the translucent layer (0.25, 0.5, 0.75 & 1mm) (n=5). Additional five specimens (O3/TN) were added and served as control group, from which Delta E, Delta L and translucent parameter were compared. One composite brand was used; Amaris esthetic resin composite system (VOCO GmbH, Germany) and measurements were done using spectrophotometer.