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目的:评价不同根管预备方法在根尖段根管预备的临床效果。方法:选取患有牙髓病变但仍具有牙髓活力且需行根管治疗的下颌第一磨牙125个,共250个近中根管,分别使用改进平衡力法、基于ProTaper的冠根向预备技术、逐步后退法进行根管预备,记录复诊时根管探查疼痛的根管数。结果:改进平衡力法根管预备后根管探查时患者自觉疼痛发生率明显少于其他两种根管预备方法。结论:观察患者的自觉疼痛症状可作为根尖段根管预备的效果评价及判断依据。
Objective: To evaluate the clinical effect of different root canal preparation methods in apical root canal preparation. Methods: 125 mandibular first molars with pulp endodontic activity that still had endodontic activity and required root canal treatment were selected. A total of 250 mesial root canal were selected, and the improved balance method, crown-forward preparation based on ProTaper Technology, and gradually retrogressive root canal preparation, record the number of root canal exploration pain when the root canal examination. Results: The improvement of balance method after root canal preparation for root canal exploration patients with conscious pain was significantly less than the other two kinds of root canal preparation methods. Conclusion: The patients’ conscious pain symptoms can be used as the root canal preparation of the root canal to assess the effect and determine the basis.