Figure 1

a. Preoperative anteroposterior radiograph of a 72 year old woman, 13 years after total hip replacement, showing aseptic loosening of the acetabular component with migration into the small pelvis (type III B). b. 7 days after acetabular revision using a Mueller ring and fresh frozen non-irradiated allograft bone. Note the distinguishable allograft bone chips medial of the ring. A polyethylene cup was cemented into the ring. c. 28-month follow up radiograph showing the implants to be unchanged with complete remodeling of the allograft bone and homogeneous trabeculation.