3种镍钛器械预备弯曲根管产生垂直向压力的比较  

Comparison of Apically Vertical Load Induced by Three NiTi Instruments during Curved Canal Shaping in Extracted Teeth

作　　者：夏智敏 吴昌哲 彭彬[2] XIA Zhimin;WU Changzhe;PENG Bin(Department of Stomatology,Vocational School,Wuhan University,Wuhan 430060,China;Department of Endodontics,School of Stomatology,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学医学职业技术学院口腔系,湖北武汉430060 [2]武汉大学口腔医学院牙体牙髓科,湖北武汉430079

出　　处：《口腔医学研究》2019年第10期975-978,共4页Journal of Oral Science Research

基　　金：湖北省自然科学基金(编号:2014CFB468)

摘　　要：目的:比较3种机用镍钛器械预备弯曲根管产生的根向力。方法:选择30颗离体单根管的下颌前磨牙,弯曲度10°-20°,随机分成3组,分别以ProTape Next(PTN)、ProTaper Universal(PTU)、M3器械预备根管,测量并比较预备根管产生的根向压力和时间。结果:PTN组的压力峰值显著小于其他两组(P<0.05),PTU组和M3组比较差异无统计学意义。结论:PTN组镍钛器械预备弯曲根管产生的根向压力较小,安全性更高。Objective:To compare the apically vertical load induced by three NiTi instruments during canal shaping of extracted teeth.Methods:Thirty extracted mandibular premolar teeth which had single canal with a curvature between 10-20 degree were shaped with ProTape Next(PTN;Dentsply Maillefer,Switzerland),ProTaper Universal(PTU,Dentsply Maillefer,Switzerland),and M3(China)systems(n=10 for each system).During root canal shaping,time and apically vertical load were recorded.Results:PTN group had the lowest apically vertical load,while PTU group and M3 group had no significant difference.Conclusion:ProTaper next NiTi instrument system(PTN)had the lowest values of apically vertical load while shaping,which may attributed to its safety.

关 键 词：镍钛器械 弯曲根管 根向压力 

分 类 号：TN9[电子电信—信息与通信工程]