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目的:评价机用ProTaper和Mtwo对弯曲根管的预备效果。方法:将临床需行根管治疗的171颗磨牙随机分为三组,分别采用ProTaper、Mtwo及不锈钢K锉对磨牙弯曲根管进行预备,比较器械折断、根管预备时间、术后反应及根管成型及充填情况。结果:根管预备时间:Mtwo的操作时间5.4 min比ProTaper的6.8 min和不锈钢K锉的13.6min短,ProTaper和Mtwo器械预备的根管锥度和流畅度均好,术后疼痛发生少。结论:ProTaper和Mtwo器械用于预备磨牙弯曲根管,效率高,成形能力佳。Mtwo器械应用常规预备法简单,预备时间短且有效。
PURPOSE: To evaluate the effects of machine ProTaper and Mtwo on curved root canal preparation. Methods: 171 molars undergoing root canal therapy were randomly divided into three groups. ProTaper, Mtwo and stainless steel K files were used to prepare curved root canal of molar respectively. The comparison of device fracture, root canal preparation time, postoperative reaction and root Tube forming and filling situation. RESULTS: Root canal preparation time: Mtwo’s operating time was 5.4 min shorter than ProTaper’s 6.8 min and stainless steel K-file’s 13.6 min. Both ProTaper and Mtwo instruments had good taper and fluency of the canal and less postoperative pain. Conclusion: ProTaper and Mtwo instruments are used for premolar curved root canal, with high efficiency and good forming ability. Mtwo instruments are routinely prepared for routine use, short preparation times and effective.