目的：评价使用铸造陶瓷高嵌体修复根管治疗后前磨牙的临床效果。方法选择94例患者的126颗根管治疗后的前磨牙进行观察，按照牙体缺损严重程度分为轻度缺损和重度缺损，使用铸造陶瓷高嵌体或石英纤维桩加烤瓷冠修复。观察36个月，比较不同组别之间成功率和存活率的差别。结果在36个月观察期结束时，桩核冠修复组轻度缺损前磨牙的成功率为96.3%，存活率为98.1%，重度缺损前磨牙成功率为88.5%，存活率为96.2%；高嵌体修复组轻度缺损前磨牙的成功率和存活率均为96.6%，重度缺损前磨牙成功率为94.1%，存活率为100%。不同组别之间的成功率和存活率的差异均无统计学意义（P>0.05）。结论就本次观察而言，采用铸造陶瓷高嵌体修复根管治疗后的前磨牙是非常可靠的方法。%ObjectiveThis study aimed to evaluate the success and survival rate of endodontically treated premolars restored by ceramic onlays by comparing restored by quartz fiber posts and metal ceramic crowns. Methods Ninety-four patients with 126 endodontically treated premolars were enrolled in this study and divided into 4 groups according to the remaining axial walls and restorative methods. The observation time was 36 months. The success and survival rates of the restorations, as well as causes of failures, were analyzed. Results At the final follow-up, the success and survival rates of the mild defect endo-dontically treated premolars were restored by quartz fiber posts and the crowns were at 96.3% and 98.1%; the success and survival rates of the severe defect premolars restored by quartz fiber posts and crowns were at 88.5% and 96.2%. The success and survival rates of the mild defect premolars restored by cast ceramic onlays were both at 96.6%, the success and survival rates of the severe defect premolars restored by cast ceramic onlays were at 94.1% and 100%, respectively. The success and survival rates of the different groups were no significant difference (P>0.05). Conclusion Based on the results and within the limits of this study, cast ceramic onlays is a very reliable method to restore endodontically treated premolars.
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