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ملفات تعريف الارتباط المستخدمة
牙結石有什麽危害?堅硬牙結石的機械壓迫能損害牙韻,壓迫牙般退縮.牙結石 作爲一個新的界面.可進一步黏附細蘭或吸附毒素等刺激因子,不 斷地作用于牙周組織.引起牙周炎症。 牙結石分爲緑上結石和龈 下結石,醵下結石還阻礙著牙周組織對牙面的附著。
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