Hematoxylin-eosin stain revealed that, BMSCs in the ACM were oval and nucleoli appeared in a few cells.The ACM were decomposed into particulates.

• 苏木精-伊红染色可见细胞嵌入软骨支架材料中，呈圆形和椭圆形，部分细胞可见细胞核，材料呈颗粒状，染色均一。