MOD Cavity Adaptation of a Ceramic Inlay Prepared by a non-Computer-Aided Milling System

抄録

The adaptation accuracy of a commercially available non-computer-aided ceramic system (CELAY system) to the MOD inlay model specified by the ADA was investigated by measuring the discrepancy between the top surface of the master die and the resin pattern or the ceramic inlay. Even when the resin pattern was prepared directly on the stainless master model, the ceramic inlay could not to be seated exactly on the master model. The discrepancy between the resin pattern and the master die (0.083 ±0.028 mm) was not significantly greater than that between the ceramic inlay and the master die (0.118±0.052 mm). However, this discrepancy was significantly decreased when the resin pattern was prepared in a stone model that had been coated with a resinous die spacer at a thickness of approximately 30 pm. However, it was still difficult to obtain a ceramic inlay which exactly fit the master model. These results suggest that greater effort should be devoted to improving the accuracy of resin pattern preparation and the milling apparatus itself.