计算机辅助设计和制造全瓷冠在前牙修复的临床效果

Clinical effect of the CAD /CAM all-ceramic crowns on the anterior tooth restoration

目的比较计算机辅助设计和制造全瓷冠与钴铬合金烤瓷冠在前牙修复的临床效果。方法采用计算机辅助设计和制造技术制作89件前牙二氧化锆全瓷冠,采用钴铬合金烤瓷冠制作67件前牙修复体,修复后1年复查,对边缘着色、龈缘密合度、修复体颜色、修复体周围龋、修复体折裂、牙龈健康情况进行评价。结果在边缘着色、龈缘密合性、修复体颜色、牙龈健康状况方面差异有统计学意义(P<0.05),全瓷冠的临床效果优于钴铬合金烤瓷冠。结论计算机辅助设计和制造全瓷冠的临床修复效果良好,是前牙修复的理想选择。

Objective To observe and compare the clinical effect of CAD/CAM all-ceramic crowns with cobalt-chro- mium alloy porcelain crowns in the restoration of anterior teeth. Methods Eighty-nine anterior teeth were restored with zirconia all-ceramic crowns, and 67 anterior teeth were restored with conventional cobalt-chromium alloy porcelain crowns. One year ＇after the restoration, the marginal discoloration, change of marginal fit, color, caries around the crown, collapse porcelain and periodontal tissue heath of the two crowns were compared. Results The differences of the margin- al discoloration, change of marginal fit, color, periodontal tissue heath between zirconia all-ceramic crowns and cobalt- chromium alloy porelain crowns was statistically significant （ P 〈 0. I ）. The clinical effect of all-ceramic crowns was bet- ter than cobalt-chromium alloy porcelain crowns. Conclusion The clinical effect of CAD/CAM all-ceramic crowns was favourable in restoring anterior teeth.