Pages 167-173, Language: EnglishShearer / Kusy / Whitley / Heymann / WilsonThe occlusal surfaces of inlays and onlays milled by the CEREC system are essentially flat, and surface morphology must be produced with rotary instruments. Six methods of finishing a machinable glass-ceramic material (Dicor MGC) were investigated using laser specular reflectance to assess the relative surface smoothness. The results indicated that all the methods produced a similarly smooth surface.