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目的:评价日本JustyⅡ根管测量仪的准确性,分析其影响因素,指导临床应用。方法:选择157个病例,184颗牙齿,共364个根管。在根测仪辅助下测量根管长度,根管充填后摄X线片评价结果。结果:JustyⅡ根测仪准确率为92%,残髓,根管内渗出,根尖孔破坏等因素会影响测量的准确性。结论:JustyⅡ根测仪使用准确率高,操作简便,虽有一定的局限性,但实用性强。
Objective: To evaluate the accuracy of Japanese Justy Ⅱ root canal measuring instrument, analyze the influencing factors and guide the clinical application. Methods: 157 cases were selected, 184 teeth, a total of 364 root canal. The root canal length was measured with the help of a root-detector and the post-root canal radiography was used to evaluate the results. Results: The accuracy of the Justy Ⅱ root detector was 92%. The residual pulp, exudation in the root canal, destruction of the apical foramen and other factors would affect the accuracy of the measurement. Conclusion: Justy Ⅱ root detector with high accuracy, easy to operate, although some limitations, but practicality.