牙的构造(模式图)
外科学

        1.牙冠 crown of tooth2.牙龈 gum3.牙颈 neck of tooth4.牙周膜 periodontal membrane5.牙根 root of tooth6.牙根尖孔 apical foramen7.釉质 enamel8.牙腔 dental cavity9.牙髓 dental pulp10.牙根管 root canal11.牙骨质 cementum    （共 198 字）     [阅读本文] >>