3种根测仪定位根管侧穿孔准确性的比较研究  

An evaluation of three electronic apex locators on detecting root perforations in vitro

作　　者：李月恒[1] 周智[1] 罗俊[1] 李锐[1] 陈娇[1] 

机构地区：[1]重庆医科大学口腔医学院,400015

出　　处：《实用口腔医学杂志》2010年第4期538-540,共3页Journal of Practical Stomatology

摘　　要：目的:比较研究Propex,Raypex 5,Root ZX全自动根管长度测量仪(根测仪)定位根管侧穿孔位置的准确性。方法:选取40颗离体前磨牙,采用ET40超声工作尖破坏根管中下部根管壁,造成根管侧穿。建立体外模型,使用Propex,Raypex 5,Root ZX全自动根管长度测量仪定位穿孔位置,并比较3种根管长度测量仪测量准确性。结果:Propex,Raypex 5,Root ZX全自动根管长度定位测量仪测量,均是定位于根管穿孔外壁的位置,并且Propex的准确率为90%,Raypex 5测量准确率为87.5%,Root ZX测量准确率为85%,但3组准确率的差异无统计学意义(P>0.05)。结论:对于根管壁侧穿的牙齿,使用Propex,Raypex 5,Root ZX全自动根管长度定位测量仪定位的穿孔位置均具有较高的准确性。Objective： To evaluate the accuracy of three electronic apex locators（Propex,Raypex 5 and Root ZX） on detecting root perforations.Methods： Forty fresh extracted premolar teeth were perforated in root canal by ultrasonic tip.An in vitro apex locating model was established.Three electronic apex locators（Propex,Raypex 5 and Root ZX） were used to detect the inner or external root canal perforation and compared the reliability of the instruments by statistical analysis.Results： Most locators detected the external location of root canal perforation,and the clinical accuracy of Propex（90%） was higher than Raypex 5（87.5%） and Root ZX（85%）,but no statistical difference was found（P 0.05）.Conclusion： For teeth with perforation in root canal therapy,the Propex,Raypex 5 and Root ZX electronic apex locators can detect the perforation with high accuracy.

关 键 词：根管长度定位测量仪 根管穿孔 根管治疗 

分 类 号：R781.05[医药卫生—口腔医学]