Fig. 4

Surgical procedures on the femoral side. a Step-cut prepared distal femoral allografts and prepared composite distal femoral allograft with LCCK implant, using APC (allograft–prosthesis composite). b After extensive removal of the hypertrophic synovium of the left knee, extensive bone loss of the distal femur was observed and APC was fixed to the host bone with a Dall-Miles cable. c The right knee was similar operative finding to that of the left knee and APC was fixed to the host bone in the same way as the left knee