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目的:比较两种频率依赖性电测仪Root ZX和ProPex在根管内不同冲洗液中的准确性。方法:选用单根管牙200颗,患牙随机分为RootZX组和ProPex组,每组各100个牙。根据冲洗液的不同,各组随机再分为5组:A组(3%H2O2)、B组(17%EDTA)、C组(0.5%NaOCl)、D组(0.9%NaCl)、E组(干燥根管)。常规根管预备后分别以3%过氧化氢、17%EDTA、0.5%次氯酸钠、生理盐水冲洗根管3次,最后一次保留冲洗液,进行根管测量,空白组为0.5%次氯酸钠和生理盐水交替冲洗后的干燥根管。用rootZX和ProPex测量在不同冲洗液下的根管长度(EL),并与X线片确定的根管长度值(AL)比较。计算不同电测仪各组EL和AL的差异(EL-AL)并将所有数据输入SPSS10.0软件进行统计学分析。结果:root ZX组和ProPex组中不同冲洗液组无显著性差异(P值分别为0.734和0.888);对于不同冲洗液,Root ZX组和ProPex组间差异无显著性(P>0.05)。结论:频率依赖性电测仪Root ZX和ProPex测量根管长度准确性不受根管内冲洗液的影响,两种电测仪测量准确性无显著性差异。
PURPOSE: To compare the accuracy of Root ZX and ProPex in different irrigation fluids in root canal. Methods: 200 single root canal teeth were used. The teeth were randomly divided into RootZX group and ProPex group with 100 teeth in each group. Each group was randomly divided into 5 groups according to the rinse solution: group A (3% H2O2), group B (17% EDTA), group C (0.5% NaOCl), group D Dry root canal). After conventional root canal preparation, the root canal was washed with 3% hydrogen peroxide, 17% EDTA, 0.5% sodium hypochlorite and saline for 3 times respectively. The last irrigation fluid was preserved for root canal measurement. In the blank group, 0.5% sodium hypochlorite and saline were alternately After washing the dry root canal. Root canal length (EL) was measured with rootZX and ProPex under different irrigations and compared to the root canal length (AL) determined by X-ray. EL-AL was calculated for EL-AL of different groups and all the data were input into SPSS10.0 software for statistical analysis. Results: There was no significant difference between the two groups (P = 0.734 and 0.888, respectively) for the different washings in the root ZX and ProPex groups. There was no significant difference between the Root ZX and ProPex groups (P> 0.05). Conclusion: The accuracy of Root ZX and ProPex measurement of root canal length is not affected by irrigation fluid in root canal. There is no significant difference between the accuracy of two kinds of electrical measuring instruments.