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為什麽戴用全口義齒時下頜比上頜更容易脫落呢

Posted By vickong pun     July 5, 2021    

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為什麽戴用全口義齒時下頜比上頜更容易脫落呢

  為什麽戴用全口義齒時下頜比上頜更容易脫落呢?因爲上颌牙槽嵴比下颌面積大,所以固位就好;咀嚼、張口時需要使用的肌肉大部分附著于下颌,當這些肌肉行使功能時,易致下颌義齒的脫落;張、閉口運動時,下颌是活動的,上颌固定;另外,在說話、咀嚼過程中離不開舌的參與,舌對下颌義齒的影響大于上颌。所以,下颌比上颌更容易脫落。

     ★ 护牙知多滴      

《義齒戴用一段時間後有點松該怎麽辦》

  

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