To establish the animal model of re pa rative dentinogenesis and investigate the histo-morphological feature of reparat ive dentinogenesis.

建立修复牙成的动物实验模型，观察修复牙成的组织态学特。

Dentinogenesis imperfecta (DI) is a kind of mesodermal defect inherited in a simple autosomal dominant mode.

牙成不良是一种体染色体显遗传的中胚层缺陷。