Figure 2.

Engineered cartilage construction for 2 and 8 weeks in vivo. Gross view (A–C, J–L), H&E staining (D–F, M–O), and immunohistochemical staining of type II collagen (G–I, P–R). Black arrows indicate homogeneously distributed lacunas (D) and intensely deposited type II collagen (G) and the undegraded polyglycolic acid fibers (M–O). (J): White arrow indicates the outline of the implant. Scale bars = 100 μm. Abbreviations: ACs, articular chondrocytes; BMSCs, bone marrow mesenchymal stem cells; HE, hematoxylin and eosin.