【作者】 张梅； 徐学良； 刘溦； 曾雄群；

【Author】 ZHANG Mei,XU Xue-liang.,LIU Wei,et al.(Guangdong Provincial Stomatological Hospital,Guangzhou 510280,China)

【机构】 广东省口腔医院·南方医科大学附属口腔医院；

【摘要】 目的:由于C形根管解剖结构的复杂性,准确测量根管工作长度较为困难,临床上亦难以通过X线片来评价根尖定位仪的准确性。本研究旨在评价ProPex根尖定位仪测量C形根管工作长度的准确性,以期为临床应用提供参考。方法:对24颗即将拔除的、术前X线片显示牙根部呈锥形或方形融合、开髓后证实为C形根管的下颌第二磨牙局麻下开髓、拔髓、冲洗,用ProPex根尖定位仪测量78个根管的工作长度(WL);完整拔除牙齿后测量根管的实际长度(AL),比较两者的长度差异。结果:以距根尖孔0.5 mm为标准,ProPex准确率为85.90%;以1.0 mm为标准,准确率为91.03%;以1.5 mm为标准,准确率为94.87%。结论:Propex根尖定位仪在C形根管工作长度确定方面的准确性较高,具有简便、快速、准确、安全、避免多次X线照射等优点,能大大缩短临床椅旁时间,提高根管治疗的效率。更多还原

【Abstract】 OBJECTIVE:To observe the accuracy of ProPex electronic apex locator in measuring c-shaped root canal working length.METHODS::78 c-shaped root canal working lengths(WL) of 24 mandibular second molars were measured by ProPex electronic apex locator in vivo.After extraction of the teeth,actual canal lengths(AL) were determined.The distance between AL and ML was recorded.RESULTS:The accuracy of ProPex was 85.90%within 0.5 mm short of the AL,91.03%within 1.0mm short of the AL and 94.87%within 1.5mm short of the AL.CONCLUSIONS:The results of this study indicate that ProPex is reliable in measuring c-shaped root canal working lengths.更多还原