下顎第一小臼齒C型根管―病例報告

C-shaped Root Canal Morphology of the Mandibular First Premolar-Cases Report

陳錦(Kam Chan) ； 林弘斌(Hung-Pin Lin) ； 黃珮華(Pei-Hwa Huang)

《中華牙醫學雜誌（中文版）》 25卷1期 (2006/03) Pp. 67-73

https://doi.org/10.7106/CJD.200603.0067

摘要

下顎第一小臼齒由於其根管形態的高度變異性，而成為臨床根管治療中非常難以治療的牙齒類別之一。其中複雜的C型根管形態，對於傳統非手術性治療而言更是一項桃戰。下顎第一小臼齒的C型根管形態，主要表現於亞洲人種中，其發生率約為10%~17%，遠較其他種族來得高。本文主要為兩個下領第一小臼齒的病例，經傳統根管再治療及蓄意再植術治療後，發現牙根的形態與C型根管相同。在根尖末端切除修形時，約3.0mm橫切面處根管明顯連接成為C型。完成治療後追蹤檢查發現臨床症狀有明顯的改善。

關鍵字

下顎第一小臼齒 ； C型根管 ； 蓄意再植術

並列摘要

The mandibular first premolar, with its wide variation in root canal morphology, is generally agreed to be the most difficult tooth to treat endodontically. The presence of a C-shaped canal system may be a challenge for carrying out the traditional root canal treatment. The expression of a C-shaped canal system may be more common in peoples of Asia. The prevalence of a C-shaped canal mandibular first premolar ranges from 10%-17% according to Sikri et al and Lu et al. This article represents 2 case reports regarding the C-shaped canal morphology at the apical third of 2 manbdibular first premolars. The clinical symptoms and signs of the patients improved after they underwent apical root resection with retrograde cleaning and shaping, super EBA filling and intentional replantation.

並列關鍵字

mandibular first premolar ； C-shaped canal ； intentional replantation