牙冠延长术；根牵引术；牙龈切除术；龈沟深度。

The crown extension technique; The root hauling technique; The gum excision; The depth of gingival sulcus.

youdao

牙冠延长术；根牵引术；牙龈切除术；龈沟深度。

The crown extension technique; The root hauling technique; The gum excision; The depth of gingival sulcus.

youdao