拔牙实测法评价根尖定位仪的准确性

Clinical evaluation of parkell foramatron D-10 apex locator

关键词:  根管治疗  根尖定位仪  拔牙

Key words:  root canal therapy  apex locator  tooth extraction

摘要:

临床评价Parkell Foramatron D-10 根尖定位仪的准确性。［方法］患者10人，需要拔除的单根牙32颗，根管32个。用Parkell Foramatron D-10 根尖定位仪测定根尖孔的位置，将扩大针固定后拔除患牙，再用立体显微镜观察并测量针尖到根尖孔的距离。［结果］在21.9%的根管中扩大针的针尖未达到根尖孔；扩大针恰好位于根尖孔的根管占28.1%；有50.1%的根管扩大针超出根尖孔。在±0.5mm误差范围内，探测根尖孔的准确率为75.0%。探测活髓和死髓根管的准确率不同，二者间没有统计学差异。［结论］Foramatron D-10根尖定位仪是一种比较可靠的确定根尖孔的仪器，但在根管治疗中仍需要拍X线片作参考

Abstract:

To investigate the accuracy of Foramatron D-10 Apex Locator. ［Methods］A total of 32 canals of 32 teeth scheduled for extraction were selected from 10 patients. Foramatron D-10 apex locator was used to detect the apical foramen by positioning an endodontic file. The distance of the file tip to the apical foramen was observed and measured under a stereomicroscope. ［Results］ The accurate location within ±0.5mm from the apical foramen was obtained in 75.0% of the canals. The file tip was situated short of apical foramen in 21.9%, coincided with it in 28.1%, beyond it in 50.1% in the case. The significant difference between vital and necrotic canals was not found(P> 0.05). ［Conclusions］ Foramatron D-10 apex locator is a reliable device in determination of apical foramen, but radiography should also be used for diagnosis before root canal therapy.