Luting composite thickness of two ceramic inlay systems

The purpose of this in vitro study was to evaluate the luting composite thickness of two ceramic inlay systems, a direct chairside ceramic inlay system (Cerec, CAD/CAM), and an indirect laboratory inlay system (IPS Empress). The luting composite thicknesses were measured at the approximal margin, at the inner axial wall and at th occlusal cavosurface area. The luting composite thickness at occlusal margins and inner axial walls were found to be smaller in Empress inlays. However, the fit of inlays was poorer in Empress inlays at distal proximal margins, which most probably resulted from displacement of Cerec inlays during cementation due to inaccurate inner fit.