目的：研究人前磨牙牙髓牙本质复合体的增龄性变化，探讨牙衰老和老年牙病的形态学基础。

Objective: to provide morphological basis for dental aging and senile teeth diseases and to study age-related changes of pulp-dentin complex of human premolar.

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目的：研究使用牙支抗式牵张器行上颌骨牵张成骨术后牙髓和牙周的组织学改变。

AIM: to observe the changes in dental pulp and periodontal tissues under the application of distraction osteogenesis using tooth-attached intraoral distracter.

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目的研究体外培养的人牙髓干细胞的生物学特性。

Objective To study the biological characteristics of cultured human dental pulp stem cells in vitro.

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