Comparison of fixed and mobile-bearing total knee arthroplasty in terms of patellofemoral pain and function: a prospective, randomised, controlled trial

• Published in: BMC musculoskeletal disorders Vol. 18; no. 1; p. 279
• Main Authors: Feczko, P Z, Jutten, L M, van Steyn, M J, Deckers, P, Emans, P J, Arts, J J
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 29-06-2017; BioMed Central; BMC
• Subjects: Analysis; Anterior knee pain; Arthritis; Arthroplasty (knee); Care and treatment; Climbing; Clinical outcomes; Comparative analysis; Fixed bearing; Hypotheses; Joint surgery; Kinematics; Knee; Knee pain; Meta-analysis; Mobile bearing; Musculoskeletal diseases; Osteoarthritis; Pain; Patient satisfaction; Prostheses; Quality of life; Statistical analysis; Surgery; Total knee arthroplasty; Treatment outcome; Total knee arthroplasty; Anterior knee pain; Fixed bearing; Mobile bearing
• ISSN: 1471-2474; 1471-2474
• DOI: 10.1186/s12891-017-1635-9

Despite growing evidence in the literature, there is still a lack of consensus regarding the use of the mobile-bearing (MB) design total knee arthroplasty (TKA).
In a prospective, comparative, randomised, single centre trial, 106 patients with end-stage osteoarthritis of the knee were randomised to either an MB or fixed-bearing (FB) group to receive posterior stabilised (PS)-TKA using a standard medial parapatellar approach and patellar resurfacing with follow-up (FU) for 5 years. The primary outcome was anterior knee pain (AKP) during the chair rise test and the stair climb test 5 years after surgery. The secondary outcome was the ability to rise from a chair and to climb stairs, range of motion (ROM), Knee Society Score (KSS), RAND-36 scores and radiological analysis of the patellar tilt.
No statistically significant difference was found between the two groups at 5 years FU in terms of median AKP during the chair rise test and the stair climb test (p = 0.5 and p = 0.8, respectively). There was no significant difference in any of the other secondary outcome parameters between the groups at 5 years FU.
A mobile-bearing TKA does not decrease AKP compared to fixed bearings.
ClinicalTrials.gov NCT02892838 .
II.