目的：评价联合使用Pathfile和 Mtwo预备弯曲根管的临床效果。方法选择2013年12月至2014年2月期间因牙髓炎或根尖周炎需进行根管治疗的90颗患牙,313个根管,随机分为3组。A组联合使用 Pathfile和 Mtwo 镍钛锉进行根管预备,B组联合使用Pathfile和ProTaper进行根管预备,C组单独使用ProTaper进行根管预备。3组均采用热牙胶连续波垂直加压充填。记录3组在根管预备时间、器械分离数、根尖偏移和充填效果方面的差异。结果 A组预备时间最短,为(6.01±1.12)min,未见器械分离和根尖偏移,恰填率高。与 B组及 C 组比较,差异均有统计学意义(均P<0.05)。结论 Pathfile和 Mtwo联合应用于预备弯曲根管快速安全,根管充填效果佳,适合临床推广应用。%Objective To evaluate the clinical efficacy of combined use of Pathfile and Mtwo in the preparation of curved root canals.Methods This study enrolled a total of 90 teeth(313 root canals)that need root canal therapy because of pulpitis or apical periodontitis from December 2013 to February 2014.All root canals were randomly divided into three groups.In group A,both Pathfile and Mtwo NiTi files were used in root canal preparation.In group B,Pathfile and ProTaper were used.ProTaper was employed alone in root canal preparation in group C.The high temperature thermaplasticized inj ectable ver-tical condensation technique was applied in all the three groups.The time of root canal preparation,the number of separated de-vices,root canal transportation and the quality of root canal filling were obtained and compared among the 3 groups.Results In group A,the time of root canal preparation was shortest,(6.01±1.12)min ;there were no instrument separation and ledge for-mation,and the filling rate was highest in group A.The differences were significantly noted in these indexes between group A and groups B,C.Conclusion Combined use of Pathfile and Mtwo for preparation of curved root canals is fast and safe,and the root canal filling is satisfactory.This method is suitable for clinical application.
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