上顎第二小臼齒牙胚延遲形成－病例報告

Delayed Odontogenesis of Unilateral Upper Premolar-A Case Report

李易臻(I-Chen Li) ； 林若筠(Jo-Yun Lin) ； 黃姵文(Pei-Wen Huang) ； 楊欣樺(Hsin-Hua Yang) ； 蕭明頤(Ming-Yi Hsiao) ； 莊才逸(Tsai-Yi Chuang)

《臺灣兒童牙醫學雜誌》 21卷3期 (2021/09) Pp. 127-133

https://doi.org/10.6319/TJPD.202109_21(3).0005

摘要

本案例為一位右側上顎第二小臼齒牙胚延遲形成的女童追蹤3年7個月的病例報告。患者當時為9歲2個月，初診時X光片顯示為恆牙右上第二小臼齒牙胚尚未形成，右上第二乳臼齒嚴重蛀牙及根尖膿腫，左下及右下第三大臼齒皆有初期牙胚形成。本案例在乳牙右上第二乳臼齒移除後3年7個月定期回診時，於X光片中發現疑似右上第二小臼齒或第三小臼齒的牙胚，故而開始矯正治療介入處理。因此，對於仍具發育潛力的患者，在先天性缺牙診斷時需要納入牙胚延遲形成的考量。

關鍵字

牙胚延遲形成 ； 根尖膿瘍 ； 第三小臼齒

並列摘要

A 9-year-old girl came to our OPD with her parents for oral examinations. Apart from multiple caries in her mouth, we found no sign of upper right second permanent premolar with carious right deciduous maxillary second molar and periapical abcess. After extraction, the space was closed spontaneously by permanent first molar mesial tipping movement. However, we found a tooth germ between the upper right first permanent premolar and upper right first permanent molar when the girl was 11-year-old, and space regaining treatment started. Hence, we should take delayed odontogenesis into consideration when making diagnosis of congenital missing, especially for the developing patient.

並列關鍵字

Delayed odontogenesis ； periapical abscess ； parapremolar