Ectopic Eruption of the Maxillary Canines: Review of Literature

上顎犬齒之異位萌發－文獻回顧

王敏靜(Min-Ching Wang) ； 施文宇(Wen-Yu Shih) ； 劉惠仙(Huei-Hsien Liu)

《臺灣兒童牙醫學雜誌》 9卷1期 (2009/04) Pp. 2-7

https://doi.org/10.6319/TJPD.2009.9(1).1

摘要

上顎犬齒常因萌發的路徑漫長，而易發生阻生或移位的現象。異位萌發或阻生的上顎犬齒有可能會出現併發症，因而定期進行臨床及X光檢查有助於早期診斷，以避免併發症之發生，甚至可使日後的矯正治療時程縮短。一些臨床及X光上的特徵可以提醒牙醫師某些患者較容易產生阻生犬齒的狀況，例如：牙弓位置不足、犬齒位置沒有隆起的跡象、左右兩側乳犬齒掉落時间隔超過半年、X光片上恆牙犬齒角度及位置有異常，甚至有其他牙齒之異常，都是需要注意之處。及早的處置如拔除乳犬齒及加上頭套的配戴都有機會引導上顎恆犬齒正常萌發。本文回顧及討論了上顎阻生犬齒的病因及處理方式。

關鍵字

異位萌發 ； 上顎犬齒 ； 阻生 ； 移位

並列摘要

The maxillary canines are prone to displace or impact due to their tortuous pathway of eruption. The ectopic or impacted maxillary canines can lead to unwanted complications. Routinely clinical and radiographic examinations can help the dentists to early diagnose and reduce serious complications. Early or timely diagnosis not only prevents the complications of ectopic eruption of the maxillary canines, but also reduces the following orthodontic treatment time. Some clinical or radiographical features can remind dentists to close follow up the patients who are prone to have impacted canine, such as inadequate arch length, lack of canine bulge, asymmetrical exfoliation of the primary canines, abnormal mesiodistal location and angulation of the permanent canine, and other anomalies of teeth. The timely interceptive treatment, extraction of the primary canine or headgear usage, potentially allows the canines to erupt normally. This article reviews and discusses the etiology and management of ectopic maxillary canine.

並列關鍵字

ectopic eruption ； maxillary canine ； impacted ； displaced