Fig. 2.

a) Anteroposterior (AP) radiograph of pelvis and upper femur region showing infected endoprosthetic total hip arthroplasty (THA) of a 53-year-old female with a chronic periprosthetic joint infection of her fourth revision right THA. The patient has epiphyseal dysplasia. A draining sinus was present over the lateral mid-thigh. A polyethylene bearing is cemented into the cementless cup. There is cement behind the metal cup. The infecting organism was Cutibacterium. b) AP radiograph of endoprosthetic PROSTALAC (PROSThesis Antibiotic Loaded Acrylic Cement) construct at six months. The patient is ambulatory with partial weight with a walker. Three preoperative aspirations are negative. c) Postoperative AP radiograph showing pelvic reconstruction with MaxTi triflange cage; 10 ml of Cerament was injected behind the cage into all defects before cementing the acetabular component into the cage. A constrained bearing was cemented into the cage construct. d) AP pelvic radiograph 12 months postoperatively. The pelvic reconstruction remains stable. Note the area of Cerament where remodelling has occurred. Remodelling is rated radiologically as moderate.