title: Minimum 10-year radiographic follow-up of a cementless acetabular component for primary total hip arthroplasty with a bulk autograft.
abstract: We radiographically investigated 36 hips in 34 patients with osteoarthritis of the hip who had undergone total hip arthroplasty. Their mean age was 59.2 years (range 36-79 years), and the mean follow-up period was 11.2 years (range 10-14 years). The long-term outcome and the chronological changes in the bulk autograft were examined. The acetabular component of the prosthesis was a Lord-type threaded cup with a smooth surface. At follow-up, bone absorption was minor in 17 joints, moderate in 11, and major in 8. The hips with graft coverage of >==20% (group A) had a significantly higher loosening rate than hips with coverage of <<20% (group B) ( P << 0.05). The cup position changed markedly in group A. Our findings indicate that graft coverage should be less than 20% when a bulk graft is used together with a smooth-surfaced cementless cup.
authors.affiliation: Department of Orthopaedic Surgery, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Inoue
authors.forename: Motoyuki
authors.initials: M
authors.lastname: Horii
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Suehara
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Ueshima
authors.forename: Toshiki
authors.initials: T
authors.lastname: Shiga
authors.forename: Mikihiro
authors.initials: M
authors.lastname: Fujioka
authors.forename: Kenji
authors.initials: K
authors.lastname: Takahashi
authors.forename: Takeshi
authors.initials: T
authors.lastname: Asano
authors.forename: Wook-Choel
authors.initials: WC
authors.lastname: Kim
authors.forename: Masako
authors.initials: M
authors.lastname: Nakagawa
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kubo
mesh_terms: D000077:Acetabulum / Q000473:pathology; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D016025:Bone Transplantation; D005260:Female; D005269:Femur / Q000637:transplantation*; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery