Fig. 3

Histological and immunohistological stained images of repaired tissue between plugs and control tissue. Repair tissue between plugs with safranin-O (A, B), type I collagen (Col I; C, D), and type II collagen (Col II; E, F) show that the repaired tissue was not hyaline cartilage because plug cartilage and cluster cells existed in the cartilage adjacent to the repaired tissue. A, C, E Low magnification (×20). B, D, F High magnification images of quadrilateral area in above images (×200). Scale bars indicate 600 μm