测量锉大小对根尖定位仪准确性的影响  

The sizes of measurement files on the accuracy of electronic apex locator

作　　者：何俐[1] 胡图强[1] 布平[1] 潘俐玲[1] 林建琴[1] 

机构地区：[1]郧阳医学院附属人民医院口腔医学研究所,湖北十堰442000

出　　处：《上海口腔医学》2010年第2期206-208,共3页Shanghai Journal of Stomatology

摘　　要：目的:研究不同型号测量锉对电子根尖定位仪(electronic apex locator,EAL)测量准确性的影响。方法:采用藻酸盐和单根管离体牙构建EAL体外评价模型,使用EAL及10#～40#K,分别对41颗单直根管离体牙进行根管长度测量,记录测量工作长度值(experimental measurements,EM)以及与理论工作长度值(ideal measurements,IM)之间的差值(IF值)。采用SPSS10.0软件包对数据进行配对t检验和χ2检验。结果:以IF值为±0.5mm为衡量标准,EAL测量准确性分别为85.4%(10#)、75.6%(15#)、85.4%(20#)、90.2%(25#)、73.2%(30#)、68.3%(35#)和63.4%(40#);以IF值为+0.5～-1.0mm为衡量标准,测量锉为10～40#时,EAL测量准确性分别为87.8%(10#)、87.8%(15#)、90.2%(20#)、97.6%(25#)、97.6%(30#)、97.6%(35#)和87.8%(40#)。对IF值的统计学分析显示,各组间均无显著性差异(P>0.05)。结论:在本实验条件下,根管预备过程中,使用25#器械,采用EAL重复测量一次,可提高根管长度确定的准确性。PURPOSE：To investigate the different sized measurement files on the accuracy of electronic apex locator （EAL） in vitro. METHODS：Alginate and extracted single-canalled tooth were used to mimic the situation in vivo. Forty-one teeth were used. EAL Raypex ±5 was applied to determine the length of the canals by 10^#-40^# K files. Experimental measurements and the distances （IF value） between experimental and ideal actual measurements under the same measurement environment were recorded. Paired sample F test was applied to analyze the results by using SPSS 10.0 software package. RESULTS：The results showed that at the allowance of ±0. 5mm,the accuracy ratios were 85.4%（10^#）,75.6%（15^#）,85.4%（20^#）,90.2%（25^#）,73.2%（30^#）,68.3%（35^#） and 63.4%（40^#）,respectively. While at the allowance of ＋ 0.5～-1.0mm,the accuracy ratios were 87.8%（10^#）,87.8%（15^#）,90.2%（20^#）,97.6%（25^#）,97.6%（30^#）,97.6%（35^#） and 87.8% （40^#）,respectively. Statistical analysis showed that there was no significant difference in accuracy between each group （P 〉0.05）. CONCLUSION：The results suggested that it be advisable to improve the accuracy of the EAL by measuring the working length one more time with 25^#K file during the preparation under this experimental environment.

关 键 词：电子根尖定位仪 根管 器械 

分 类 号：R781.05[医药卫生—口腔医学]