Fig. 3

Female, 55 years, periprosthetic joint infection. a Preoperative X-ray showed that the stem was well fixed and was removed by using ETO. b X-ray two months after spacer implanted showed nonunion of the ETO osteotomy fragment (green arrow) and osteopenia of greater trochanter (blue arrow). c The spacer was removed and the Corail Revision femoral stem was implanted. Anteroposterior and lateral X-rays immediately after operation (c1 and c2). The stem and femur matched well. The stem realized immediate and reliable fixation. X-ray showed nonunion of the ETO osteotomy fragment (green arrow) and osteopenia of greater trochanter (blue arrow). d Anteroposterior and lateral X-rays two months after operation (d1 and d2) showed spot welds in Gruen3/5 (white arrow), callus in osteotomy line (green arrow) and osteopenia of greater trochanter (blue arrow). e Anteroposterior and lateral X-rays three years after operation (e1 and e2) showed no subsidence of the stem, restoration of proximal femur, union of the ETO fragment (green arrow), bone ingrowth from osteotomy fragment to stem (blue arrow), spot welds in femoral isthmus (white arrow), and atrophy of femoral calcar (red arrow)