根管长度电测仪测定后牙根管工作长度的临床研究

A clinical study of posterior teeth root canal working length measured by electronic apex locator

目的:探讨RootZX根管长度电测仪测量后牙根管工作长度的临床效果。方法:采用RootZX对60例79个后牙186个根管进行根管长度测量,以此长度进行根管预备,按测量长度插入牙胶尖摄X线牙片,计算出实际工作长度,计算RootZX测量根管工作长度的准确率。结果:在实际工作长度±0.5mm范围内,ZootZX测量准确率为87.6%,测量活髓和死髓牙根管工作长度的准确率无显著性差异(P>0.05)。结论:ZootZX根管长度测定仪测定根管工作长度准确性较高。

Objective： To investigate the clinical effect of Root ZX electronic apex locator in measuring posterior teeth root canal working length. Method： 186 root canals working length of 60 patients with 79 posterior teeth were measured by Root ZX and calculate by X-ray. Result： An accurate rate of real working length ranged ± 0.5 mm was 87.6%. The difference between vital pulp and necrotic pulp was not significant（ P 〉0.05）. Concluion： Root ZX is accurate in root canal working length measuring.