Obective To determine the clinical effects of preventing post treatment pain of root canal therapy(RCT) with Zhong Tong An(ZTA), a Chinese medicine.
目的对中成药肿痛安定风止痛胶囊（ZTA）用于预防根管治疗术后疼痛的临床疗效作出评价。
Conclusion One appointment root canal therapy is a safe, time saving, and economic RCT method.
结论一次性根管治疗术是节省时间行之有效的治疗方法。
AIM: to discuss the relationship between inter-appointment pain during root canal therapy (RCT) and diagnosis and tooth site.
目的：探讨根管治疗术中约诊间痛和牙位与诊断的关系。
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