Fig. 3

Radiographs of a 44-year-old man who underwent revision THA for periprosthetic joint infection. a, b Anteroposterior and lateral radiographs prior to stage 2 revision THA showing a Paprosky type IIIA femoral bone defect. c, d Radiographs immediately after revision THA using an extensively porous-coated stem with cortical strut allografts, showing that the cortical strut allografts bridged the bone defects (white arrow) and supported the thinning cortex. e, f Postoperative radiographs at 9 years showing successful incorporation of the cortical strut allografts to the host bone, bone restoration in the bone defect area (white arrow), and a significant increase in femoral width. No sign of stress shielding and distal cortical hypertrophy was observed. The stem was assessed as bone ingrowth stable