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.
目的：观察全冠牙体预备后牙髓牙本质复合体的反应及剩余牙本质厚度和修复时间对牙髓的影响。
Objective: To determine the importance of the remaining dentin thickness, preparation depth and post-operative time on the pulpal inflammation after the crown preparation.
目的：研究血管活性肠肽(VIP)在牙髓牙本质复合体中的表达，探讨其功能。
AIM: To study the expression of vasoactive intestinal polypeptide (VIP) in dental pulp-dentine complex of human premolar and its function.
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