Suguru Nakamura1, Yukihide Minoda2, Shigeru Nakagawa3, Yoshinori Kadoya4, Susumu Takemura4, Akio Kobayashi5, Shigekazu Mizokawa1, Yoichi Ohta1, Sinji Takahashi1, Kazumasa Yamamura1, Hiroaki Nakamura1. 1. Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan. 2. 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. 3. Department of Orthopaedic Surgery, Osaka Rosai Hospital, 1179-3 Nagasone-chyou Kita-ku Sakai, Osaka 591-8025, Japan. 4. Department of Orthopaedic Surgery, Hanwa Joint Reconstruction Centre, 3176 Hukai-Kitamachi Naka-ku Sakai, Osaka 599-8271, Japan. 5. Department of Orthopaedic Surgery, Shiraniwa Hospital, 6-10-1 Shiraniwadai Ikoma, Nara 630-0136, Japan.
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.
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: Giorgio Cacciola; Fabio Mancino; Federico De Meo; Vincenzo Di Matteo; Peter K Sculco; Pietro Cavaliere; Giulio Maccauro; Ivan De Martino Journal: J Orthop Date: 2021-02-22