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目的 :预防根管治疗后牙体修复失败。方法 :根管治疗后的患牙分两组 ,对照组用磷酸锌垫底后银汞合金充填 ,实验组经轻度降低咬 ,减少颊舌径及降低牙尖斜度后 ,直接银汞合金充填。结果 :经半年至 2年观察 ,对照组成功率为 6 6 6 7% ,实验组为 88 5 4% ,经卡方检验 ,P <0 0 5。结论 :实验组成功率显著高于对照组。
Objective: To prevent the failure of dental restoration after root canal therapy. Methods: The teeth after root canal treatment were divided into two groups. The control group was filled with silver amalgam after the bottom of zinc phosphate. In the experimental group, after the bilirubin was mildly decreased, the bucco-lingual diameter was reduced and the cusp inclination was decreased, the direct amalgam Filling. Results: After 6 months and 2 years, the success rate of the control group was 66.7% and that of the experimental group was 88.5%. The chi square test showed that the success rate of the control group was P <0 05. Conclusion: The success rate of experimental group was significantly higher than that of control group.