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

1.建立修复形成的动物实验模型，观察修复形成的组织形态学特征。

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

2.形成不良是一种体染色体显遗传的中胚层缺陷。