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Histological findings in the tendon-to-bone insertion in each group at 2, 4, and 8 postoperative weeks (Safranin O staining): At 8 postoperative weeks, tendon (T), fibrocartilage (F) and bone (B) were observed in each group. The BMP-7+GHS group showed an increase in chondrogenesis compared to the other groups. Magnification is 100×, and the scale bar indicates 100 μm. Dotted line indicates the boundary line between tendon and bone or tendon and fibrocartilage.
