RayPex5根尖定位仪测量根管工作长度准确性的临床评价

A clinical evaluation on accuracy of RayPex5 apex locator for measuring root canal working length

采用手感法、电测法测量211个根管工作长度,而后用X线片法对所确定的根管工作长度进行验证。电测法和手感法准确率分别为96.21%和78.20%,两者有显著统计学差异(P<0.001)。电测法测量前牙和磨牙的准确率分别为100%和92.5%,两者有统计学差异(P<0.05),而测量根尖周有病变与无病变组、前牙与前磨牙组、前磨牙与磨牙组准确率均无统计学差异。研究表明,电测法测定根管工作长度准确性高,且测量前牙的准确率高于测量磨牙的准确率;Raypex5型根尖定位仪可以较准确地测量根管工作长度。

In order to evaluate the accuracy of RayPex5 apex loeator in measuring root canal working length in elinical practice and to analyze the possible factor resulting in deviation, the working length of total 211 root canals were measured by handing method and electronic method respectively. The exact working length of those root canals were determined by X-ray method. The accuracy rate of electronic method and handing method was 96.21% and 78.2% respectively, with significant difference（P 〈0. 001 ）. The accuracy rate of front teeth group and molar group measured by electronic method was 100% and 92.5% respectively, with significant difference （P 〈 0.05 ） , while the apical paradentitis group and the apical non-paradentitis group, the front teeth group and the premolar group, and the premolar group and the molar group didn＇t differ from each other, respectively. The study showed that the accuracy rate of electronic method was high for determining root canal working length, and Raypex 5 apex loeator could define apical seat to measure root canal working length accurately.