利用鎳鈦線扶正下顎阻生第二大臼齒－病例報告

Uprighting of Impacted Lower Second Molar by Using NiTi Wire-Case Report

李盈欣(Ying-Hsin Lee) ； 李廣華(Kwong-Wa Li) ； 羅信義(Shin-Yi Lo)

《中華民國齒顎矯正學雜誌》 18卷1期 (2006/03) Pp. 42-48

https://doi.org/10.30036/TJO.200603.0007

摘要

下顎牙弓空間不足或第二大臼齒本身過度的近心軸向傾斜，常造成第二大臼齒前傾和阻生。除了影響正常咬合功能外，常因食物阻塞而伴隨大臼齒間軟組織發炎或第一大臼齒遠心側齲齒。因此當發現第二大臼齒無法順利萌發，通常會建議病患以矯正方式扶正以獲得良好的咬合。而在進行臼齒扶正時除考慮矯正裝置之效率，方便性及病患舒適性之外，尚需考慮如何控制錨定，以避免造成錨定牙齒不必要的前移或挺出。
本篇報告是利用鎳鈦線之超彈性特性有效率地將前傾之阻生第二大臼齒扶正，並著重於如何在扶正過程中獲得良好的錨定控制。

關鍵字

阻生大臼齒 ； 扶正阻生齒 ； 鎳鈦線扶正阻生齒

並列摘要

Excessive mesial-axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar. Despite of food impaction and proximal caries of first permanent molar, impacted lower second molar also affect the normal function of occlusion. Several methods have been proposed for unlocking impacted permanent second molar, the technique of choice would be determined by such factors as the efficiency and convenience of appliance, the preparation of anchorage and the undesired side effect.
In this article a new technique using the NiTi wire to upright the impacted lower second molar is introduced. The fabrication of this appliance, the preparation of the anchorage, and how to avoid the undesired side effects during the treatment will be discussed.

並列關鍵字

Impacted molar ； Molar upright ； Uprighting molar by using NiTi wire