拔除上颌磨牙腭侧及近中颊侧根管影像学与电子工作长度测定的比较
Comparison of radiographic and electronical working length determination on palatal and mesio-buccal root canals of extracted upper molars.
作者信息
Krajczár Károly, Marada Gyula, Gyulai Gábor, Tóth Vilmos
机构信息
Conservative Dentistry and Periodontology Department, University of Pécs, Faculty of Medicine, Dental School, Hungary.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2008 Aug;106(2):e90-3. doi: 10.1016/j.tripleo.2008.04.007. Epub 2008 Jun 13.
OBJECTIVE
The objective of this work was to compare the accuracy of working length determination of ProPex (Dentsply-Maillefer) electronic apex locator (EAL) to the radiographic method on extracted molars.
STUDY DESIGN
Root canal length was determined using the electronic apex locator and conventional radiographic method. Digital radiographs were taken and the distance between the tip of the file and the radiographic apex was measured. Mann-Whitney and chi(2) tests were used for the statistical analysis.
RESULTS
The average distance between the tip of the file and the radiographic apex in the mesio-buccal canals was 0.46 mm with the radiologic method, and 0.23 mm with EAL, and 0.43 mm and 0.31 mm in the palatal canals, respectively. The difference at the mesio-buccal canals was significant (Mann-Whitney test P = .048). The number of overextensions was higher in the EAL group.
CONCLUSION
The desired position of the file achieved by the EAL proved to be more accurate in the mesio-buccal canals than with the radiologic method alone.
目的
本研究旨在比较ProPex（登士柏-迈耶费尔）电子根尖定位仪（EAL）与X线片法确定离体磨牙工作长度的准确性。
研究设计
采用电子根尖定位仪和传统X线片法确定根管长度。拍摄数字化X线片并测量锉尖与X线片根尖之间的距离。采用曼-惠特尼检验和卡方检验进行统计学分析。
结果
在近中颊根管中，X线片法测得锉尖与X线片根尖之间的平均距离为0.46 mm，EAL测得为0.23 mm；在腭根管中，分别为0.43 mm和0.31 mm。近中颊根管中的差异具有统计学意义（曼-惠特尼检验P = .048）。EAL组超充的数量更多。
结论
事实证明，在近中颊根管中，EAL确定的锉尖理想位置比单独使用X线片法更准确。
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