上顎彎曲門齒之治療－三例病例報告

Treatment of dilacerated maxillary central incisors- cases report

林瑩澤(Yng-Tzer Lin)

《中華牙醫學雜誌》 23卷4期 (2004/08) Pp. 321-327

https://doi.org/10.7105/CDJ.200408.0321

摘要

彎曲牙(dilacerated tooth)是一種形態異常的牙齒，特徵為牙冠與牙根長軸呈現彎曲之角度。由於牙齒牙冠與牙根之間的彎曲，導致牙齒未能萌出或阻生。彎曲度小之彎曲門牙，經由手術合併矯正牽引的方法，大多能成功的引導其萌出。但是，對於彎曲度大之彎曲門齒，顧及牙齒牽引出後牙髓及牙根可能受損，且手術的困難度高，考慮以手術拔除此牙，配合矯正排整後，以假牙重建恢復外觀。本文提出三病例報告，依彎曲角度的大小，給予不同的考量與治療，包括牙冠暴露手術矯正牽引彎曲牙、二階段牙冠暴露手術矯正牽引彎曲牙，以及手術拔除彎曲牙，經矯正排整以黏著牙橋重建其美觀。

關鍵字

彎曲門牙 ； 矯正牽引 ； 牙冠暴露手術

並列摘要

An impacted incisor with dilaceration refers to a dental deformity characterized by angulation between the crown and rod causing noneruption or impaction of the incisor. Most incisors with mild dilaceration can be successfully positioned into the proper position through adequate crown exposure and orthodontic traction. However, for incisors with severe dilaceration, surgical extraction followed by orthodontic alignment and prosthodontic reconstruction is indicated because of the difficulty in performing surgery and possible pulp and root damage which can occur during treatment. This article reports 3 cases with different degrees of dilacerated incisors. Treatment methods included crown exposure with orthodontic traction, 2-stages crown exposure surgery with orthodontic traction, and surgical extraction followed by orthodontic alignment and resin-bonded bridge restoration.

並列關鍵字

dilacerated incisor ； orthodontic traction ； crown exposure