Results c-jun was found negative in the mouse tooth bud and cap stage but stained positive in the bell stage .

结果c-jun原癌基因在小鼠 牙 胚 的 蕾 状 期、帽状期呈阴性表达，在钟状期 牙 胚 的 成 牙 本质细胞中呈阳性表达。

RESULTS : ① There were significantly positive expressive results in situ hybridization in rat tooth germ bud stage . Its expressive parts concentrated mainly outside embryo mesenchyme around tooth germ and the top of tooth bud .

结果：①大鼠牙胚蕾状期原位杂交可见明显阳性表达结果，其表达部位主要集中于牙胚及 牙 蕾顶部邻近的外胚间充质。

In this case the cells were taken from what is known as the tooth germ the little bud that appears before an animal grows a tooth .

在这一研究中，这些细胞来源于所谓的 牙胚即动物出牙前发生的 幼芽。

Expression of Bone Morphogenetic Protein ( BMP ) - 2 in Mouse Embryonic Tooth During the Bud Stage

骨形成蛋白-2、4在胎鼠 牙 胚 蕾 状期的表达

Human tooth development is a consecutive process which includes bud stage cap stage bell stage and tooth root development .

人类 牙齿的发育，经历 蕾 状期、帽状期、钟状期、牙根发育和牙齿 萌出 期。