Revision total hip arthroplasty using an interlocking stem with an allograft-prosthesis composite


Published online: Aug 27 2013

Katsufumi UCHIYAMA, Mitsutoshi MORIYA, Takeaki YAMAMOTO, Kensuke FUKUSHIMA, Naonobu TAKAHIRA, Moritoshi ITOMAN

From Kitasato University School of Medicine, Kanagawa, Japan

Abstract

We report the clinical and radiographic outcomes and complications of revision surgery using a cementless interlocking stem with an allograft-prosthesis composite (APC). This study included 11?patients with an average follow-up of 7.3?years. Of the 11 revisions, 1 was aseptic, 7 were septic, and 3 were periprosthetic femoral fractures. The mean Harris hip score improved from 25.6?points before surgery to 74.8 points at final follow-up. Osseous union at the proximal allograft-host bone junction occurred in 10?hips (90.9%)?; the greater trochanter did not unite in 4 of 7 hips (57.1%). Moderate and severe allograft resorption occurred in one hip each. Postoperative complications included 1 deep infection, 2 heterotopic ossifications, and 1 dislocation. Using an interlocking stem with an allograft-prosthesis composite in revision surgery provided acceptable results in the presence of circumferential massive bone deficiency of the proximal femur.