Management of Permanent First Molar Affected by Molar-Incisor Hypomineralization: A Case Report

臼齒切齒礦質化不足之第一大臼齒的處置：病例報告

蔡孟嵐(Meng-Lan Tsai) ； 王姻麟(Yin-Lin Wang) ； 王詩凱(Shih-Kai Wang) ； 張曉華(Hsiao-Hua Chang) ； 黃桂芬(Gui-Fen Huang) ； 郭敏光(Ming-Kuang Guo) ； 鄧伊婷(Yi-Ting Deng) ； 林晶瑩(Chin-Yin Lin) ； 張晏慈(Yen-Tzu Chang) ； 江慧君(Hui-Chun Chiang)

《臺灣兒童牙醫學雜誌》 22卷1期 (2022/03) Pp. 42-47

https://doi.org/10.6319/TJPD.202203_22(1).0006

摘要

Molar-incisor hypomineralization (MIH) is a developmental defect of the enamel of one or more permanent first molars with or without affecting incisors. The clinical symptoms and signs vary from case to case and between teeth in the same individual, including hypersensitivity, enamel breakdown, dental caries and pulpal inflammation. The affected enamel shows increased amount of proteins that leads to lower hardness and lower modulus of elasticity. The affected enamel can be a well-defined area or including the entire crown. After the hypomineralized molars erupted, there may be enamel fracturing and wearing. Early enamel loss can cause dental caries and rapid deterioration of the clinical crown. There are two cases in this case report. One is a 7-year-old boy with hypomineralized enamel of teeth 16 and 26. The other is a 6-year-old girl who has four hypomineralized permanent first molars with different severity. The discussion focuses on clinical symptoms and signs and how treatment strategies are made.

關鍵字

Molar-incisor hypomineralization ； Permanent first molar

並列摘要

臼齒切齒礦質化不足主要是第一大臼齒的琺瑯質發育缺陷，有時也會影響到切齒。臨床的症狀從局部的白色斑塊到黃褐色的大範圍病灶。受影響的琺瑯質的礦物成分較低，蛋白質和水的含量變多，導致琺瑯質比較脆弱，當牙齒萌發之後，就會容易斷裂，造成齲齒的發生。本篇病例報告追蹤了兩位臼齒切齒礦質化不足的病人，一位是7歲的男孩，另一位是6歲的女孩，兩者之間受影響的牙齒不同，嚴重程度也不相同。討論的部分主要是針對常見的臨床症狀和其對應的治療計畫該如何制訂。

並列關鍵字

臼齒切齒礦質化不足 ； 第一大臼齒