Fig. 6From: Classification and reconstruction of femoral bone defect in the revision of aseptic loosening of distal femoral endoprostheses: a 10-year multicenter retrospective analysisa: The prosthesis was not displaced before surgery, the isthmus was intact, and the bone cortex around the prosthesis was absorbed, belonging to type I. b: The original prosthesis and cortical strut allograft were used for revision during the operation. c: The prosthesis was in a good position during 5Â years of follow-upBack to article page