下顎第二小臼齒C型根管—病例報告

C-shaped Canal in a Mandibular Second Premolar—Case Report

陳瑞陽(Ray-Yong Chen) ； 杜博仁(Bor-Ren Duh)

《中華牙醫學雜誌》 22卷4期 (2003/12) Pp. 371-376

摘要

C型根管在文獻上的記載以下顎第二大臼齒為主，學者Weine的報告中曾經提到C型根管在下顎第二大臼齒的發生率約為4%~7.6%。治療此種根管時，因為它具有複雜的解剖型態，所以在根管清創的過程中容易留下器械不易清創的死角，造成治療效果不彰。C型根管發生在下顎第二小臼齒的文獻記載非常少，當發現下顎第二小臼齒具有C型根管時，將因為操作視野及工作區域受到牙冠部位解剖型態的侷限，更增加其呵難程度。本篇報告是針對下顎第二小臼齒發現C型根管的一個病例報告。

關鍵字

C型根管 ； 第二小臼齒 ； 牙根分叉處穿通

並列摘要

According to the literature, “C-shaped” canals occur mainly in the mandibular second molar. As indicated in the article by Weine (1998), the incidence of “C-shaped” canals in the mandibular second molar was 4%~7.6%. Due to complications of anatomical deviation, there can be very much dead space in “C-shaped” canals, which are not easily debrided by instruments, and may frequently cause a poor prognosis for treatment. But there is much less literature discussing “C-shaped” canals in mandibular second premolars. Owing to limitations of the operating view and working field a “C-shaped” canals in a mandibular second premolar is more difficult to manage. This article is a case report about a “C-shaped” canals in a mandibular second premolar.

並列關鍵字

C-shaped canals ； second premolar ； furcation perforation