title: Revision total hip arthroplasty using an interlocking stem with an allograft-prosthesis composite.
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 73 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.
authors.affiliation: Department of Orthopaedic Surgery, Kitasato University School of Medicine, Kanagawa, Japan. katsufu@cf6.so-net.ne.jp
authors.forename: Katsufumi
authors.initials: K
authors.lastname: Uchiyama
authors.forename: Mitsutoshi
authors.initials: M
authors.lastname: Moriya
authors.forename: Takeaki
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kensuke
authors.initials: K
authors.lastname: Fukushima
authors.forename: Naonobu
authors.initials: N
authors.lastname: Takahira
authors.forename: Moritoshi
authors.initials: M
authors.lastname: Itoman
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D002484:Cementation; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology; D011474:Prosthesis Design; D012086:Reoperation; D014184:Transplantation, Homologous