title: Clinical results of alumina medial pivot total knee arthroplasty at a minimum follow-up of 10years.
abstract: BACKGROUND
  The medial pivot total knee prosthesis with alumina ceramic femoral components was introduced to reproduce physiological knee kinematics and reduce polyethylene wear. The five-year clinical outcomes of alumina medial pivot total knee arthroplasties (TKA) have previously been reported. The purpose of this study was to provide the longer-term clinical results at a minimum follow-up of 10years.
  
  
  METHODS
  The clinical results of 70 alumina medial pivot TKA in 51 consecutive patients, with a minimum follow-up period of 10years, were evaluated.
  
  
  RESULTS
  Mean follow-up was 11.8years (range 10 to 13). Alumina medial pivot TKAs improved the patients' Knee Society knee scores, function scores, and postoperative ranges of motion compared with their pre-operative statuses (P<0.05 for each). Revision surgery was required in one knee due to a postoperative fracture of the tibial plateau after a fall that occurred two years postoperatively. Osteolysis and femoral component loosening was identified in one case after the initial five-year time point of analysis. The survival rate was 99.1% at 10years.
  
  
  CONCLUSIONS
  This study demonstrated excellent clinical results for patients receiving the alumina medial pivot prosthesis at a minimum follow-up period of 10years.
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
authors.forename: Suguru
authors.initials: S
authors.lastname: Nakamura
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan. Electronic address: yminoda@msic.med.osaka-cu.ac.jp.
authors.forename: Yukihide
authors.initials: Y
authors.lastname: Minoda
authors.affiliation: Department of Orthopaedic Surgery, Osaka Rosai Hospital, 1179-3 Nagasone-chyou Kita-ku Sakai, Osaka 591-8025, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Nakagawa
authors.affiliation: Department of Orthopaedic Surgery, Hanwa Joint Reconstruction Centre, 3176 Hukai-Kitamachi Naka-ku Sakai, Osaka 599-8271, Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Kadoya
authors.affiliation: Department of Orthopaedic Surgery, Hanwa Joint Reconstruction Centre, 3176 Hukai-Kitamachi Naka-ku Sakai, Osaka 599-8271, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Takemura
authors.affiliation: Department of Orthopaedic Surgery, Shiraniwa Hospital, 6-10-1 Shiraniwadai Ikoma, Nara 630-0136, Japan.
authors.forename: Akio
authors.initials: A
authors.lastname: Kobayashi
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
authors.forename: Shigekazu
authors.initials: S
authors.lastname: Mizokawa
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Ohta
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
authors.forename: Sinji
authors.initials: S
authors.lastname: Takahashi
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Yamamura
authors.affiliation: Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nakamura
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000537:Aluminum Oxide; D001168:Arthritis / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D001672:Biocompatible Materials; D002516:Ceramics; D005269:Femur / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D007720:Knee Prosthesis; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design; D012086:Reoperation; D013977:Tibia / Q000601:surgery
chemical_list: D001672:Biocompatible Materials; D020959:Polyethylene; D000537:Aluminum Oxide
keywords: Alumina ceramic; Medial pivot design; Minimum follow-up of 10years; Total knee arthroplasty