Details

Autor(en) / Beteiligte

• Jacobs, W. C. H.
• Christen, B.
• Wymenga, A. B.
• Schuster, A.
• van der Schaaf, D. B.
• ten Ham, A.
• Wehrli, U.

Titel

Functional performance of mobile versus fixed bearing total knee prostheses: a randomised controlled trial

Ist Teil von

• Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2012-08, Vol.20 (8), p.1450-1455

Ort / Verlag

Berlin/Heidelberg: Springer-Verlag

Erscheinungsjahr

2012

Quelle

MEDLINE

Beschreibungen/Notizen

• Purpose The primary goal of this study was to assess the difference in active flexion between patients with a mobile versus a fixed bearing, cruciate retaining, and total knee arthroplasty. The study was designed as a randomised controlled multi-centre trial. Methods Participants were assigned to interventions by using block-stratified, random allocation. Outcome parameters were active flexion, passive flexion, and Knee Society Score (KSS). Outcome parameters were assessed preoperatively and at 3, 6, and 12 months postoperatively by an independent nurse. Results Ninety-two patients from one centre were included, 46 in each group. Active flexion was comparable for the two groups, 99.9° for the mobile bearing group and 101° for the fixed bearing group with a baseline controlled difference of 1.0 (95% CI −3.9 to 5.8, n.s.). The Clinical KSS was comparable between the two bearing groups (Mobile 90.0 vs. fixed 92.4, n.s.). The functional KSS showed a difference that was attributable to the stair climbing subscore, which showed a difference in favour of the fixed bearing design between preoperative and 3 months (7.3 point difference; 95% CI 2.3–12.5; P  = 0.005) as well as 12 months (4.8 point difference; 95% CI 0.1–9.6; P  = 0.045). Conclusions There were no short-term differences in active flexion between fixed bearing and mobile bearing total knee arthroplasty. Level of evidence I.