【摘要】 目的　采用鸡胚建立一种新的小鼠牙胚体内培养模型。方法　取 15d龄的昆明胎鼠下颌第一磨牙牙胚 ,将其用钨丝固定于孵化 4～ 5d(翼芽期 )的鸡胚内 ,继续孵化 10d后 ,终止培养并取材 ,进行苏木精 -伊红染色 ,常规组织学观察。结果　小鼠牙胚在鸡胚内可继续生长发育 ,从帽状期进入到钟状末期 ,镜下可见分化成熟的成牙本质细胞、成釉细胞和分泌的基质。结论　以翼芽期鸡胚作为小鼠牙胚体内培养的宿主 ,可以保持其发育 ,再现牙齿形成过程中的细胞分化、形态发生的生理过程。更多还原

【Abstract】 Objective To establish a new culture systerm for mouse tooth germs in chick embryo.Methods The mandibular first molar germ fragments of 15 embryonic days′ Kunming mouse embryo were implanted into the lateral mesenchyme of 4～5 days′ chick embryo wing buds in ove. Eggs were reincubated and implanted tissues were examined by histochemistry.Results The cultured tooth germ development continued from cap stage to latest bell stage. The ameloblast and the odontoblast all differentiated maturely and secreted matrix.Conclusion 4～5 days′ wing buds chick embryo could serve as developing the mouse tooth germs and demonstrate well physiological process of differentiation and morphogenesis.更多还原