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. 2021 Feb 16;16:139. doi: 10.1186/s13018-021-02281-0

Fig. 5.

Fig. 5

HE staining of the tendon-bone interface. Ingrowth of trabecular bone into the graft was observed in the S group, similar to the findings of our previous study (a). Massive trabecular bone formation in the core area of the graft was observed in the HA group (b). Safranin O staining revealed more mature osteointegration at the tendon-bone interface in the HA group (d) than in the S group (c). b, bone; if, interface; g, graft