Fig. 4

Russell-Movat staining of tendon-bone interface. At 6 weeks after operation, the osseointegration was not obvious in the two groups (a,b). At 12 weeks after operation, bone trabeculation was observed at the tendon-bone interface in the PLLA group(c), while in the PLLA-HA group, there was osseointegration between the bone trabeculae and the transplanted tendons. Scale bar = 100 μm