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目的 观察在根管治疗中用超声波预备根管后一次性根充的疗效。方法 选择诊断为不可复性牙髓炎的患牙３１６ 颗，分为超声波组（２００ 颗） 和对照组（１１６ 颗），分别采用超声波和手用器械的方法制备根管，然后进行根管充填。结果 经一年的观察，超声波组的成功率为９７．９２％ 。对照组的成功率为７４．５４％ ，两组之间有显著性差异。结论 超声波制备根管具有省时、效率高，比手用器械备根效果好的特点。
Objective To observe the effect of one-time root-filling after root canal preparation with root canal therapy in root canal therapy. Methods A total of 316 teeth diagnosed as irreversible pulpitis were selected and divided into two groups: ultrasound group (200) and control group (116). Ultrasonic and hand instruments were used to prepare root canal, and root canal filling . Results After a year of observation, the success rate of the ultrasound group was 97.92%. The success rate of the control group was 74.54%, there was a significant difference between the two groups. Conclusion Ultrasonic preparation of root canal has the advantages of saving time, high efficiency and better root preparation than hand instruments.