Blogs Home » Education » 為什麽戴用全口義齒時下頜比上頜更容易脫落呢
vickong pun
vickong pun
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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。

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