[Retracted] Effects of Early Weight-Bearing Treadmill Training Combined with Pre-Emptive Analgesia on Femoral Fracture Recovery

Figure 4

HE staining results. (a) Representative images of bone tissue around the fracture site from four groups at 7 d after surgery by HE staining (scale bars, 50 μm). Black arrows indicate inflammatory cell infiltration, fibroplasia, or new capillaries; red arrows indicate osteoclasts; white arrow indicates osteonecrosis; blue arrow indicates abscesses. (b) Representative images of bone tissue around the fracture site from four groups at 14 d after surgery by HE staining (scale bars, 50 μm). Black arrows indicate inflammatory cell infiltration; red arrow indicates osteoclasts; purple arrow indicates fibrous callus. (c) Representative images of bone tissue around the fracture site from four groups at 21 d after surgery by HE staining (scale bars, 50 μm). Black arrow indicates inflammatory cell infiltration; green arrows indicate cartilage callus; yellow arrow indicates trabecular bone; purple arrow indicates fibrous callus. (d) Representative images of bone tissue around the fracture site from four groups at 28 d after surgery by HE staining (scale bars, 50 μm). Yellow arrow indicates trabecular bone; green arrows indicate cartilage callus. (e) Representative images of bone tissue around the fracture site from four groups at 35 d after surgery by HE staining (scale bars, 50 μm). Green arrow indicates cartilage callus; yellow arrows indicate trabecular bone; purple arrow indicates fibrous callus.

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