台灣南部地區正中贅生齒之臨床及放射線攝影調查

A Clinical and Radiographic Study of Mesiodens in Southern Taiwan

楊芳泰(Fang-Tai Yang) ； 林瑩澤(Yng-Tzer Lin)

《臺灣兒童牙醫學雜誌》 6卷3期 (2006/09) Pp. 281-287

https://doi.org/10.6319/TJPD.2006.6(3).2

摘要

研究目的：本研究之目的在於分析台灣南部地區孩童的正中贅生齒的特性。
方法與對象：研究對象為至高雄長庚醫院兒童牙科就診的430位具有正中贅生齒的兒童。所有病患皆接受臨床及上顎前牙區放射線攝影檢查。調查包括：病患年齡、正中贅生齒的數目分佈、男女性發生率差異、位置、型態、萌發方向、處置方式、對上顎恆中門齒萌發之影響等方面的回顧性統計分析。
結果：研究結果顯示430位病患中共有552顆正中贅生齒，平均每人1.28顆，就診發生率3.29%；男性發生率為女性的3.57倍。所有正中贅生齒中，以腭側(98.1%)、錐形(82.25%)、反向萌發(57.67%)的比例較多。有半數以上病患的門齒萌發會受影響，其影響包括阻礙門齒萌發、門齒異位萌發以及造成過大的齒縫間隙。
結論：當病患有不正常的正中門齒萌發現象時，應接受上顎前牙區放射線攝影檢查，來確認是否起因自贅生齒。

關鍵字

贅生牙 ； 正中贅生齒

並列摘要

Purposes: The purpose of this study was to investigate the characteristics of mesiodens among children in Southern Taiwan.
Methods: The study population consisted of 430 children who visited orthodontic or pediatric dental clinic of Kaohsiung Chang Gung Memorial Hospital for dental care. The characteristics of mesiodens were obtained from clinical and radiographic examinations including age, tooth number, location, tooth shape, direction of eruption, and effects on the permanent dentition.
Results: The results showed that 430 patients (552 mesiodens) had a prevalence rate of 3.29% and an average of 1.28 mesiodens per person. Male was affected 3.57 times more frequently than female. Most of the mesiodens were conical shape (82.25%), in palatal side (98.1%) and erupting invertedly (57.67%). The effects on permanent maxillary incisors were found in approximately half of the patients including uneruption, ectopic eruption, and diastema.
Conclusion: It is concluded that when abnormally erupting permanent incisors are noted in the youngsters, dental x-rays for maxillary anterior region are necessary to examine the possibility of a mesiodens.

並列關鍵字

Supernumerary Tooth ； Mesiodens