Repairing the Osteochondral Defect in Goat with the Tissue-Engineered Osteochondral Graft Preconstructed in a Double-Chamber Stirring Bioreactor

Figure 9

The immunohistochemistry staining of collagen II in groups A and B at 12 weeks and 24 weeks postoperatively (×200). (a) The immunohistochemistry staining of collagen II in group A at 12 weeks. (b) The immunohistochemistry staining of collagen II in group A at 24 weeks. (c) The immunohistochemistry staining of collagen II in group B at 12 weeks. (d) The immunohistochemistry staining of collagen II in group B at 24 weeks.