Fig. 9

Radial shockwaves enhance formation of cartilage matrix and type II collagen in vivo. At 8 weeks following surgery, histochemical staining (Alcian blue and Safranin O/Fast Green) and immunohistochemical staining (type II collagen and PCNA) were performed. Stained sections scored using the modified ICRS II histology scoring system for cartilage repair. Scale bar = 1 mm. PCNA proliferating cell nuclear antigen, MSC mesenchymal stem cell