It was expressed focally in the oral epithelium, dental lamina, outer enamel epithelium, stratum intermedium and stellate reticulum at cap and bell stages.

• 结果 :COX - 2在牙胚发育期间存在特异的时空分布模式 ,其阳性表达主要在牙胚发育帽状期、钟状期的口腔上皮、牙板上皮、外釉、中间层和星网状层。