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牙頸部為什麼會有缺損？

Publicado por vickong pun     5 de julio de 2021    

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牙頸部為什麼會有缺損？

　　牙頸部為什麼會有缺損？牙唇、頰側頸部硬組織的缺損呈楔形稱楔狀缺損，是複合因素慢性長期作用的結果。
主要是牙頸部的結構比較薄弱，易被磨去；
牙頸部是合力應力集中區，長期的咀嚼使牙體組織疲勞，應力集中；
刷牙方法不當等綜合因素致牙頸部出現缺損。

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