下颌门牙疑似双管的入路预备。

Zhonghua ya yi xue hui za zhi Pub Date : 1989-03-01
L S Lay, W H Lai, C Y Chi, C T Wu
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引用次数: 0

摘要

根管封闭不全是导致根管治疗失败的常见原因之一。根据以前的研究,大约10-45%的下门牙有两个管。本研究的目的是:1。确定中国人下切牙双根管的发生率;2. 评估X线对定位下门牙双根管的有用性;和3。提出一种在诊断为双根管的下门牙预备通道的方法。收集100个下切牙,采用X线检查,中、中、中、中、中移位30度,以确定双管的发生率,并评价其片上图像。此外,还提出了一种绘制双根管从根尖到切缘的路径的方法,作为通道腔准备的参考。本研究结果显示,100个下门牙中有36个有双根管,只有2个有两个独立的尖孔。临床上,当下切牙根管在根中三分之一处X线图像模糊或缺失时,最好将入路腔延伸至切牙边缘,以便找到舌管。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Access cavity preparation for mandibular incisors with suspected two canals].

One of the common reasons for endodontic failure is incomplete root canal obturation. According to previous studies, about 10-45% of all lower incisors have two canals. The purposes of this study were: 1. determine the incidence of double canals in the lower incisors among Chinese; 2. evaluate the usefulness of X rays for locating double canals in the lower incisors; and 3. propose a method of access cavity preparation for lower incisors when double canals are diagnosed. One hundred lower incisors were collected and checked by dental X ray, mesiodistally, buccolingually and at a 30 degrees mesial shift, in order to determine the incidence of double canals and evaluate their images on film. In addition, a method for drawing the pathway of the double canals from the apex to the incisal edge, as a reference for access cavity preparation, was proposed. The results of this study showed that 36 out of the 100 lower incisors had double canals and only two of them had two separate apical foramina. Clinically, when the X ray image of the lower incisor canal is obscure or missing at the middle third of the root, it is best to extend the access cavity to the incisal edge in order to find the lingual canal.

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