摘要
目的:通过对体外牙根管的测量,比较TCM Endo V和Tri Auto ZX两种根管测量仪在根管再治疗病例中的测量精度。方法:选择人新鲜拔除根尖发育完备具有较直单根管的上下颌切牙46个,使用不锈钢锉测量实际工作长度后进行根管预备充填,采用两种根管测量仪对充填后根管使用自动回旋模式和非回旋电测量模式进行测量,对比两种测长仪的精确性。结果:两种设备均可获得精确的根尖长度。两种系统在回旋模式测得的值(ARL)均超出了真实工作长度(TL)和非回旋模式测得的值(EL)。结论:自动回旋模式和非回旋模式相比有明显差异(P<0.05),ARL较TL和EL偏大。非回旋模式下测量更精确,Tri AutoZX系统精确性更高。
AIM： To evaluate ex vivo the accuracy of the integrated electronic root canal length measure- ment devices within TCM Endo V and Tri Auto ZX motors in the retreatment of filled root canals. METHODS ： Forty six freshly extracted maxillary and mandibular incisor teeth with mature apices were selected. Following cavity prepara- tion, we compared the true root canal length and those indicated by the two devices when used in automatic apical re- verse function length （ARL） and when inserted passively （electronic measurement of canal length, EL）. RESULTS： ARL values measured by the two devices were both significantly greater than EL and the true length （ P 〈 0.05 ）. CONCLUSION： There were significant differences between the accuracy of measurements in active （rotating） and passive （not- rotating） modes; both devices were more accurate when used in passive mode. However, the Tri Au- toZX was significantly more accurate in a greater proportion of cases.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2012年第6期351-353,350,共4页
Chinese Journal of Conservative Dentistry
