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固定義齒中對起“固定”作用的牙有什麽要求

Posted By vickong pun     July 8, 2021    

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固定義齒中對起“固定”作用的牙有什麽要求

  固定義齒中對起“固定”作用的牙有什麽要求?起“固定”作用的牙又稱“基牙”,對其要求如下:

①形態正常,已有破壞或形態不正常的應該進行充填、完善的根管治療、冠修複或增加基牙等措施來保證義齒的固位。

②牙根要粗長、穩固,牙根周圍的組織不能吸收過多。

③牙髓(牙神經)有活力爲最佳,對于牙髓已有病變的基牙應該先進行完善的根管治療,確認不會影響修複效果後方可作爲基牙。

④牙周組織健康,牙龈健康,無進行性炎症,根尖無病變,牙槽骨結構正常,牙根周圍的骨組織無吸收或吸收不超過牙根長度的1/第3,並且吸收停止。

⑤基牙的位置也要基本正常,無過度的扭轉或傾斜,不影響義齒的整體戴入。

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