牙齿是典型的上皮-间充质器官，由原口腔上皮和其下方的神经嵴来源的外胚间充质相互作用而形成。
Tooth is a typical epithelium-mesenchyme organ, which is formed through the mutual function between the original oral epithelium and epiblastic mesenchyme from the neural crest below.
有报道骨髓间充质干细胞可分化为肌成纤维细胞，并迁徙至损伤器官参与其纤维化形成过程。
It has been reported that bone marrow mesenchymal stem cells can differentiate into myofibroblasts, and migrate to the damaged organs to participate the fibrotic process.
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