中文摘要：

目的：采用瓷睿刻计算机辅助设计与制作（CAD/CAM）系统制作全瓷高嵌体修复根管治疗后的后牙牙体缺损,观察其1年期临床疗效。方法：：选取46例根管治疗后的后牙,使用瓷睿刻（CEREC）系统,IPS e.max CAD材料,制作全瓷高嵌体,双固化树脂水门汀粘结。修复后1年,采用改良USPHS标准对修复体、牙体、牙周等各方面指标进行评价,同时评价患者满意度。结果：87%的修复体各项检查标准都达到了USPHS标准A类,患者满意率92%。CEREC全瓷高嵌体1年期疗效确切。结论：使用瓷睿刻（CEREC）系统制作的IPS e.max CAD全瓷高嵌体可作为根管治疗后后牙牙体缺损的有效修复方案。

英文摘要：

Objective：To evaluate the clinical effect of IPS e.max CAD ceramic onlay restoration of endodontically treated posterior teeth.Methods：Forty-six endodontically treated posterior teeth were restored with IPS e.max CAD ceramic onlay designed by CEREC SW4.2.After 12 months,the patients were recalled.The teeth with restoration were assessed by using the modified USPHS criteria including secondary caries,gingivitis,tooth fracture,marginal discoloration,marginal integrity criteria and restoration fracture/debond,etc.At the same time,the patient＇s satisfaction was evaluated.Results：Of all the 46 teeth,40were scored A in all aspects.One tooth was fractured.The total satisfactory rate of patients was 92%.Conclusion：Ceramic onlay made by CAD/CAM is an effective restoration for endodontically treated posterior teeth.