根尖狭窄破坏对PropexⅡ电子根尖定位仪准确性的影响

doi:10.19439/j.sjos.2017.03.003

上海口腔医学 ›› 2017, Vol. 26 ›› Issue (3): 251-253.doi: 10.19439/j.sjos.2017.03.003

根尖狭窄破坏对PropexⅡ电子根尖定位仪准确性的影响

胡玉凤¹, 金文忠²

1.上海市口腔医院·复旦大学附属口腔医院口腔内科, 上海 200031;；
2.上海交通大学医学院附属第九人民医院·口腔医学院口腔修复科,上海 200011;

收稿日期:2016-12-23 修回日期:2017-03-14 出版日期:2017-06-25 发布日期:2017-07-05
通讯作者: 金文忠,E-mail：jinwz4180@sh9hospital.org
作者简介:胡玉凤（1982-）,女,硕士,主治医师,E-mail：stanley-317@163.com
基金资助:
上海市卫生和计划生育委员会青年科研课题资助项目（20134Y029）

Influences of destroyed apical constriction on the accuracy of PropexII electronic apex locator

HU Yu-feng¹, JIN Wen-zhong²

Department of Oral Medicine, Shanghai Stomatological Hospital, Fudan University. Shanghai 200031;
2. Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine. Shanghai 200011, China

Received:2016-12-23 Revised:2017-03-14 Online:2017-06-25 Published:2017-07-05

摘要/Abstract

摘要： 目的研究在根尖狭窄破坏的情况下,PropexⅡ测量准确性与根尖孔大小的相关性。方法磨除40颗单直根管离体牙根尖1 mm,采用2%液态琼脂凝胶注入卡斯特罗模型,使用PropexⅡ电子根尖定位仪进行根管长度测量,记录测量值（LP）,计算实际测量的根管工作长度（L）与电测法测量的根管工作长度（LP）的差值（ΔL）。显微镜下拍摄根尖孔图像,利用Photoshop CS 6.0软件测量根尖孔面积（S）。采用SPSS 22.0软件包对测量结果进行直线相关回归分析。结果以±0.5 mm作为ΔL的允许范围, ΔL均为正值。在根尖狭窄破坏的情况下,PropexⅡ的测量准确率为52.5%。R值为0.903,S与ΔL呈线性相关。建立的线性回归方程为：S=0.04+0.11×ΔL。结论在根尖狭窄破坏的情况下,电子根尖定位仪准确性下降;根尖孔面积越大,准确性越差。

关键词: 电子根尖定位仪, 根尖狭窄, 根尖孔面积

Abstract: PURPOSE: To study the correlation between apical foramen area and accuracy of PropexII electronic apex locator under destroyed apical constriction. METHODS: Forty extracted teeth with single straight root canal were ground down 1 mm in the root tip and placed in 2% liquid agar gel injected into Castro model. The length of root canal was measured by PropexII electronic apex locator. The difference (ΔL) between the electronic length (LP) and actual length (L) was calculated. Imaging of apical foramen was recorded under microscope and apical foramen area (S) was measured by image processing software Photoshop CS. SPSS 22.0 software package was used to analyze the linear correlation and regression. RESULTS: With ±0.5 mm as the allowable range, all value of ΔL was positive. The precise rate of PropexⅡ was 52.5% when apical constriction was destroyed. There was a linear relationship between S and ΔL (S=0.04+0.11×ΔL,R=0.903）. CONCLUSIONS: The accuracy decreases when apical constriction is destroyed. The accuracy is worse when the apical foramen area is larger.

Key words: Electronic apex locator, Apical constriction, Apical foramen area

中图分类号:

R781.05

胡玉凤, 金文忠. 根尖狭窄破坏对PropexⅡ电子根尖定位仪准确性的影响[J]. 上海口腔医学, 2017, 26(3): 251-253.

HU Yu-feng, JIN Wen-zhong. Influences of destroyed apical constriction on the accuracy of PropexII electronic apex locator[J]. Shanghai Journal of Stomatology, 2017, 26(3): 251-253.

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根尖狭窄破坏对PropexⅡ电子根尖定位仪准确性的影响

Influences of destroyed apical constriction on the accuracy of PropexII electronic apex locator

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