抄録
The purpose of this study was to evaluate the marginal and internal fit of all-ceramic crowns fabricated using the Decsy CAD/CAM system. A master die of maxillary first premolar was measured, and experimental crowns were fabricated. Four conditions were established by combining two convergence angles (4° and 12°) of the abutment with two different luting space settings (15μm and 55μm). The results showed that the experimental crowns had a marginal gap of 42 to 56μm. When the luting space setting was 15μm, the internal gap was 85-88μm; when the setting was 55μm, the internal gap was 126-138μm. The marginal gap for each experimental crown met the clinically acceptable criterion.
