Abstract:

Objective    To evaluate working time and postoperative responses to single-visit root canal treatment for mandibular first molar with Reciproc and Mtwo instruments. Methods    Choose 56 patients who received single-visit root canal treatment for mandibular first molar， and they were randomly divided into group A ［Reciproc group （28 cases）］ and group B ［Mtwo group （28 cases）］. Root canal was prepared with group A and B instrument and root canal was filled in single-visit； record the total time of operation， postoperative pain time， postoperative medication time and postoperative effectiveness after one week. Results     Clinical operation time of group A averaged （35.43 ± 6.04）minutes and group B averaged （39.00 ± 3.34）minutes， the difference being statistically significant （P < 0.05）. In terms of postoperative pain time and postoperative medication time and efficient cases after one week， group A was （1.25 ± 1.82）days，（1.73 ± 1.27）days and 26 cases， group B（0.98 ± 1.55）days,（1.24 ± 1.32）days and 27cases，there being no significant difference （P > 0.05） between group A and group B. Conclusion    In single-visit root canal treatment for mandibular first molar，clinical operation time of Reciproc group is slightly shorter than that of Mtwo group， but both groups can achieve good clinical effect.

Key words: root canal treatment, single-visit, mandibular first molar

摘要：

目的    比较Reciproc和Mtwo 两种镍钛根管预备系统在下颌第一磨牙一次法根管治疗术中的应用效果。方法    选择2015年4—10月在南京医科大学附属南京医院口腔科接受下颌第一磨牙根管治疗术的患者56例，随机分为A、B两组，A组（28例）采用Reciproc单支锉系统预备根管，B组（28例）采用Mtwo系统预备根管，两组根管预备后均行一次法根管充填，记录根管预备及根管充填操作的总时间，术后电话随访疼痛情况、用药天数及术后1周的有效率。结果    根管预备及根管充填操作的总时间A组平均为（35.43 ± 6.04）min，B组平均为（39.00 ± 3.34）min，两组比较差异有统计学意义（P＜0.05）；术后疼痛时间、用药天数A组平均为（1.25 ± 1.82）d和（1.73 ± 1.27）d，B组平均为（0.98 ± 1.55）d和（1.24 ± 1.32）d，两组比较差异均无统计学意义（均P＞0.05）；术后1周有效率A组为92.86%（26/28），B组为96.43%（27/28），两组比较差异无统计学意义（P＞0.05）。结论    下颌第一磨牙牙髓炎的一次法根管治疗术中，Reciproc单支锉系统临床操作时间较Mtwo系统略短，两种系统都能取得良好的临床效果。

关键词: 根管治疗, 一次法, 下颌第一磨牙