In bell stage ( E19), the positive staining was detected in both inner and outer enamel epithelium, but the inner was less than that of the outer and less positive staining was also found in the cells of stratum intermedium and stellate reticulum. 钟状期(胚胎19d),内、外釉上皮阳性表达,但内釉上皮较外釉上皮表达弱,中间层及星网状层细胞弱阳性表达;
CONCLUSION: At onset of HERS, the inner enamel epithelium, outer enamel epithelium embrace several cells with developed cytoplasmic organelles, which may derive from stratum intermedium or stellate reticulum, and form a structure like enamel organ, which may be associated with initial cementogenesis. 结论:上皮根鞘发生时,内、外釉上皮间可包容个别源于网状层或中间层、细胞器丰富的细胞,从而形成类似成釉器的结构。
BMP may also be found in human tooth germs, predentin, the cells of outer and inner enamel epithelium, and the cells of dental sac generating alveolar bone. 在人的牙胚中,BMP主要分布在前期牙木质、外釉细胞和造釉细胞以及形成牙槽骨的牙囊细胞中,表明骨的生长和形成以及牙齿的发育都与BMR密切相关。