title: Total hip arthroplasty using a Kerboull-type plate for rapidly destructive coxarthrosis: comparison with uncemented acetabular component.
abstract: BACKGROUND
  Clinical outcomes of total hip arthroplasty (THA) to treat rapidly destructive coxarthrosis (RDC) have been reported, but to our knowledge, there have been no studies comparing implants. The aim of this study was to examine the effectiveness of acetabular reconstruction for RDC by comparing the clinical results of THA using a Kerboull-type plate with an uncemented cup.
  
  
  METHODS
  Among 921 primary THAs performed between 2006 and 2014, 27 were performed for the treatment for RDC using a Kerboull-type plate or a conventional uncemented cup. A Kerboull-type plate for acetabular reinforcement device was used in 13 hips and an uncemented cup in 14 hips. The mean follow-up period was 61.2 months.
  
  
  RESULTS
  The duration of surgery was 156.8 ± 36.4 min in the Kerboull-type plate group and 103.3 ± 14.4 min in the uncemented cup group, being significantly longer in the former (P = 0.0002). In the Kerboull-type plate group and the uncemented cup group, the 5-year survival rates were 100 and 83.9 %, respectively. Recurrent dislocation was observed in two cases in which the posterior approach had been used.
  
  
  CONCLUSIONS
  In our study, the loosening of the acetabular components was noted in 14.3 % of uncemented cup-applied cases, but no loosening was noted in any Kerboull-type plate-applied case. Therefore, for RDC, in which objective evaluation of fragile bone quality is difficult, the use of the Kerboull-type plate, which disperses weight-bearing of the acetabular, may be an effective means to achieve early functional recovery as well as a long-term favorable outcome.
authors.affiliation: Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan. tobaba@juntendo.ac.jp.
authors.forename: Tomonori
authors.initials: T
authors.lastname: Baba
authors.affiliation: Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Homma
authors.affiliation: Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Ochi
authors.affiliation: Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Ozaki
authors.affiliation: Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Mikio
authors.initials: M
authors.lastname: Matsumoto
authors.affiliation: Department of Orthopedic Surgery, Juntendo Urayasu Hospital, Chiba, Japan.
authors.forename: Katsuo
authors.initials: K
authors.lastname: Shitoto
authors.affiliation: Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kaneko
mesh_terms: D000077:Acetabulum / Q000601:surgery; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D001860:Bone Plates; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D016896:Treatment Outcome
keywords: Kerboull-type plate; Rapidly destructive coxarthrosis; Total hip arthroplasty; Uncemented acetabular component