[Clinical evaluation of ceramic inlay made by CAD/CAM for 3 year].

In this study,ceramic inlays made by CAD/CAM system were used to restore posterior tooth defects.After three years of clinical observation on 21 prostheses no secondary caries was found and patients satisfied with their restoration on aspects of color match and resistance to wear etc.Five cases of inlay fracture and of obvious space between inlay margin and Cavowall were found.The main reason was the insufficient thickness of the inlays meanwhile the selection of bonding agent was not appropriate.The clinical successful rate is 76.20%.As CAD/CAM is a sophisticated technique induced into prosthodontic area just in 1980's,it has still some deficiency to be improved and perfected.