en
Scientific article
English

Fixed-bearing versus mobile-bearing total knee arthroplasty: a prospective randomised, clinical and radiological study with mid-term results at 7 years

Published inKnee, vol. 15, no. 3, p. 206-210
Publication date2008
Abstract

Mobile-bearing (MB) total knee arthroplasty (TKA) was developed as an alternative to the established fixed-bearing (FB) design because of theoretical advantages. Short-term studies comparing these designs have not shown any differences in clinical and radiographic results. We compared the results at 7 years of a randomised study of patients undergoing TKA using either a FB or a MB variant of the same prosthesis. Fifty-two patients (52 knees) with an average age of 70 years received a FB posterior-stabilized prosthesis, and 50 patients (52 knees) with an average age of 72 years, a MB prosthesis. All implants were cemented and the patella was routinely resurfaced. Preoperatively, there were no differences between the two groups, and surgical procedure and postoperative protocol were the same for both. At an average follow-up of 7.1 years, no significant differences of FB over MB design could be demonstrated with respect to the American Knee Society score (AKSS), pain score, a questionnaire of general health (SF-12 score), range of motion (ROM), or complication rates. Radiographs showed no significant difference in prosthetic alignment or evidence of loosening. Two knees with a MB design required reoperation, one for persistent joint stiffness and another to treat septic loosening. One patient with a MB prosthesis with signs of tibial component loosening was asymptomatic. We conclude that at mid-term follow-up there is no evidence to prove the superiority of MB over FB TKA with regard to the clinical and radiographic results.

Keywords
  • Aged
  • Aged, 80 and over
  • Female
  • Humans
  • Knee Joint/radiography/surgery
  • Knee Prosthesis
  • Male
  • Middle Aged
  • Osteoarthritis, Knee/surgery
  • Pain Measurement
  • Prospective Studies
  • Prosthesis Design
  • Range of Motion, Articular
  • Treatment Outcome
Citation (ISO format)
LAEDERMANN, Alexandre et al. Fixed-bearing versus mobile-bearing total knee arthroplasty: a prospective randomised, clinical and radiological study with mid-term results at 7 years. In: Knee, 2008, vol. 15, n° 3, p. 206–210. doi: 10.1016/j.knee.2008.01.010
Main files (1)
Article (Accepted version)
accessLevelRestricted
Identifiers
ISSN of the journal0968-0160
544views
0downloads

Technical informations

Creation02/24/2009 3:09:00 PM
First validation02/24/2009 3:09:00 PM
Update time03/14/2023 3:01:00 PM
Status update03/14/2023 3:01:00 PM
Last indexation01/15/2024 6:13:19 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack