An 8-year evaluation of sintered ceramic and glass ceramic inlays processed by the Cerec CAD/CAM system

The purpose of this study was to evaluate Cerec CAD/CAM inlays processed of two industrially made machinable ceramics during an 8-yr follow-up period. Each of 16 patients received two similar ceramic inlays. Half the number o f the inlays were made of a feldspathic (Vita Mark II) and the other of a g lass ceramic (Dicor MGC) block. The inlays were luted with a dual resin com posite and evaluated clinically using modified USPHS criteria at baseline, 8 months, 2, 3, 5, 6 and 8 yr, and indirectly using models. At baseline, 84 % of the inlays were estimated as optimal and 16% as acceptable. Postoperat ive sensitivity was reported by one patient for 8 months. Of the 32 inlays evaluated during the 8 yr, 3 failed due to fracture of the material. No sec ondary caries was found adjacent to the inlays. No significant differences in the clinical performance were found between inlays made of the two ceram ics. It can be concluded that the CAD/CAM inlays processed of the two ceram ics functioned well during the 8-yr follow-up period.