치과 CAD/CAM용 크롬-코발트 연질 금속블록으로 제작한 3-unit 브리지의 변연 적합도
Marginal Accuracy of Three-Unit Bridge Fabricated Using Dental Co-Cr CAD/CAM Soft Metal Block
김시철, 이해형,
소속 상세정보
김시철 ( Kim Si-Chul ) - 단국대학교 치과대학 생체재료학교실
이해형 ( Lee Hae-Hyoung ) - 단국대학교 치과대학 생체재료학교실
KMID : 1035320160430020177
Abstract
Dental CAD/CAM technology have been introduced to the field of dental laboratory processing for fabrication of metallic prosthesis in order to substitute traditional lost-wax technique. The purpose of this study was to investigate the internal adaptation accuracy of 3-unit fixed partial denture (bridge) made of Co-Cr soft metal block with dental CAD/CAM systems. A three-unit bridge model was prepared with two types of margin (knife and chamfer). The master models were used to fabricate three-unit bridge with soft metal block by CAD/CAM system. Internal fit was measured by a replica technique at the areas of marginal opening (MO), marginal gap (MG) of maximum curvature area, axial gap (AG), and occlusal gap (OG). For MO gap, bridge with chamfer margin recorded a significantly higher adaptation accuracy than bridge with knife margin, however, MG gap with knife was significantly smaller than MG gap with chamfer (P＜0.05). The mean gap dimensions of all area measured were under 120 ㎛. Overall results indicate that the CAD/CAM fabricating method for metal restorations can substitute the conventional lost-wax technique in terms of marginal accuracy.
키워드
Dental CAD-CAM; Bridge; Co-Cr alloy; Soft metal block; Accuracy of fit
원문 및 링크아웃 정보
등재저널 정보