Late Developing Supernumerary Premolars: Reports of Two Cases

晚期形成的多生小臼齒：病例報告

容佳珮(Chia-Pei Jung) ； 歐陽黎薇(Li-Wei Ou Yang)

《臺灣兒童牙醫學雜誌》 15卷2期 (2015/07) Pp. 63-69

https://doi.org/10.6319/TJPD.2015.15(2).5

摘要

多生牙定義為乳齒或恆齒齒列中牙齒數目比正常多，統計顯示亞洲人發生率較高。92.8%的多生牙位於上顎前牙區且發育在其相關牙齒之前，然而，這篇文章提出兩例晚期形成多生牙小臼齒病例，目前多生牙並沒有造成任何症狀，因此建議定期觀察。拍攝Ｘ光片是診斷多生牙的主要工具，而牙科電腦斷層更是可以幫助醫師確定多生牙與齒列的相關位置並發現潛藏併發症。本篇文章藉此病例強調定期追蹤Ｘ光片的重要性，尤其是有多生牙家族史以及曾經有多生牙的病患。

關鍵字

多生小臼齒 ； 晚期形成 ； 犬齒－小臼齒區域

並列摘要

Supernumerary teeth are defined as extra teeth that can develop in both primary and permanent dentition withhigher prevalence in Asian population. 92.8% of supernumerary teeth are found in the maxillary anterior region and begin to develop before the teeth that they are related. However, this article presents two cases of late developing supernumerary premolars. Supernumerary premolars of both cases were left in situ and under observation periodically due to no radiographic evidence of complications. Radiographic examination plays an important role in diagnosis of supernumerary teeth. Dental CT also helps to clarify the exact relationship between supernumerary teeth and normal dentition and to detect complications. This article emphasizes the importance of regular follow-up of patients who were genetically predisposed to or previously diagnosed with supernumerary teeth.

並列關鍵字

Supernumerary premolars ； late developing ； canine-premolar region