CAD/CAM二氧化锆全瓷固定桥的修复效果评价

摘要

To observe the 36 months follow-up outcome of zirconia all-ceramic posterior fixed dental prostheses(FDPs)designed and manu-factured by computer aided design and computer aided manufacture (CAD /CAM)from clinical aspect,and to evaluate the success rate of zirconia framework and veneering porcelain.78 patients with less than three teeth lost which had natural opposing teeth were included.A to-tal of ninty-two zirconia all-ceramic FDPs (59 three-unit FDPs,20 four-unit FDPs and 13 five-unit FDPs)were made by CAD /CAM.Three years after cementation of the restorations,the reasons for complication and failure of FDPs in different lengths were analysed.Six FDPs were removed (frame fracture:1;porcelain fracture:1;secondary caries:2;vertical root fractures and post-core fracture after root canal therapy of premolars:2).The success rate of these FDPs was 93.5%.The success rate of zirconia all-ceramic crowns and bridges was higher.Their clinical effect was satisfactory.The main complications of these FDPs were porcelain fracture and de-bonding.%选择78名口内最多缺失2颗牙且存在对颌牙用 CAD／CAM氧化锆固定桥修复的患者，制作92件固定桥：3单位桥59件，4单位桥20件，5单位桥13件。在修复体粘接后，随访3年，分析不同长度的全瓷桥并发症的发生和失败原因的差异。6件固定桥需要拆除，修复成功率93．5％；1例因支架断裂拆除，1例由于崩瓷面积较大而拆除，2例因继发龋脱落而不能重新粘接，另外 2例前磨牙根管治疗后牙根纵裂和核折断导致修复失败。二氧化锆全瓷冠桥具有较高的成功率，临床效果满意，主要并发症是崩瓷和脱粘接。