[摘要]目的 研究根管测量仪确定老年人根尖周炎磨牙根管工作长度的准确性。方法 临床磨牙需做根管治疗的老年病人492例共1 411个根管，其中有根尖病变者528个，无根尖病变者883个。用Root Zx测量其长度后，插入诊断丝拍X线片，验证其准确性。结果 有根尖病变组根管测量准确率为85.42%，无根尖病变组为 97.85% ，两组比较，差异有显著性( χ 2 =80.50，P <0.01)。结论 根管测量仪不能作为确定老年人有根尖病变根管工作长度的最终手段。

    [关键词] 根管测量仪;根尖周疾病;牙髓腔;工作长度;老年人

    THE ACCURACY OF MEASURING WORKING LENGTH BY ROOT CANAL APEX LOCATOR IN THE AGED WITH PERIAPICAL PERIODONTITIS MOLARS

    L JIAN， CAO YI

    (Department of Gerostomatology， Qingdao Stomatological Hospital， Qingdao 266001，China)

    [ABSTRACT]ObjectiveTo evaluate the accuracy of working length determination by TRI AUTO Zx root canal apex loca-tor in the aged with periapical periodontitis molars. MethodsThis study consisted of 492 senior patients with 1 411 root canals needed to be treated. Of whom ......