Minimum 10-year radiographic follow-up of a cementless acetabular component for primary total hip arthroplasty with a bulk autograft.
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.
Inoue
Shigehiro
S
Department of Orthopaedic Surgery, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
Horii
Motoyuki
M
Suehara
Hiroshi
H
Ueshima
Keiichiro
K
Shiga
Toshiki
T
Fujioka
Mikihiro
M
Takahashi
Kenji
K
Asano
Takeshi
T
Kim
Wook-Choel
WC
Nakagawa
Masako
M
Kubo
Toshikazu
T
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