目的：探讨牙科手术显微镜结合超声工作器械进行根管再治疗的临床应用效果。
Objective: To explore the use of dental operating microscope with ultrasonic instruments in root canal retreatment.
方法：对135例需要恒磨牙根管再治疗患者的159颗恒磨牙(232个根管)用显微超声技术进行再治疗，按牙位及治疗原因分类，比较成功率。
Methods: the total of 232 root canal in 159 teeth of 135 patients who need root canal retreatment of the permanent molar were treated by using dental operative microscope and ultrasonic technique.
目的探讨超声冲洗对根管治疗失败再治疗临床疗效的作用。
Objective To evaluate the clinical efficacy of ultrasonic irrigation in re-treatment the failure in endodontic treatment.
目的探讨超声冲洗对根管治疗失败再治疗临床疗效的作用。
Objective To evaluate the clinical efficacy of ultrasonic irrigation in re-treatment the failure in endodontic treatment.
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