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J Arthroplasty. 2012 Feb;27(2):207-12. doi: 10.1016/j.arth.2011.05.021. Epub 2011 Jul 12.

Greater satisfaction in older patients with a mobile-bearing compared with fixed-bearing total knee arthroplasty.

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Department of Orthopaedic Surgery, Hospital General Elda, Ctra Elda-Sax s/n, 03600 Elda, Alicante, Spain.

Erratum in

  • J Arthroplasty. 2012 Sep;27(8):1583.
  • J Arthroplasty. 2012 May;27(5):822.


A prospective, randomized, controlled, double-blind trial was performed to compare outcomes between 61 mobile- and 58 fixed-bearing primary TKAs in patients aged 70 years or older. At last follow-up, no difference was found for Knee Society score. The mobile-bearing group had greater knee flexion at 3 and 6 months, but this was similar at 2 years. The patient satisfaction was better in the mobile-bearing group than in fixed-bearing group, with respect to Knee Society functional score, Western Ontario MacMasters University score, Short-Form 12 score, and visual analog scale score. A multivariate analysis confirmed that the only independent factors predictive of postoperative quality of life were early postoperative flexion. We believe that better perception and satisfaction with mobile-bearing in older patients was due to the earlier regain of their knee flexion. Our results justify the use of mobile-bearing design in the older population.

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