Figure 5.

(A) Hematoxylin & Eosin staining of the biphasic scaffold implantation group (reorganized picture, original magnification ×5). The histology showed successfully cartilage regeneration over defect creating region (between two arrows). The repaired cartilage integrated well with the surrounding cartilage. Good growth of the subchondral bone was observed. The defect in the lower panel was filled with undegraded scaffold, and partial bony ingrowth in the scaffold porous was noted. (B) H & E staining of the untreated control group. Untreated defects in the control group were filled mostly with disorganized fibrocartilage that did not restore a smooth articular surface with adjacent host cartilage. The subchondral bone region was replaced by fibrocartilage.