149.牙的构造 (模式图)
基础医学

        1.牙冠crownoftooth2.牙龈gum3.牙颈neckoftooth4.牙周膜periodontalmembrane5.牙根rootoftooth6.牙根尖孔apicalforamen7.釉质enamel8.牙腔dentalcavity9.牙髓dentalpulp10.牙根管rootcanal11.牙骨质cementum    （共 165 字）     [阅读本文] >>