Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Clinical Trial
. 2022 May 2;23(1):413.
doi: 10.1186/s12891-022-05382-x.

No difference in clinical outcome, pain, and range of motion between fixed and mobile bearing Attune total knee arthroplasty: a prospective single-center trial

Paul Ruckenstuhl  1 , Fabio Revelant  1 , Georg Hauer  1 , Gerwin A Bernhardt  1 , Lukas Leitner  1 , Gerald Gruber  1 , Andreas Leithner  1 , Patrick Sadoghi  2
Affiliations
Clinical Trial

No difference in clinical outcome, pain, and range of motion between fixed and mobile bearing Attune total knee arthroplasty: a prospective single-center trial

Paul Ruckenstuhl et al. BMC Musculoskelet Disord. .

Abstract

Background: Despite numerous scientific investigations, the tribological advantages of mobile bearing inserts have not been sustainably confirmed or refuted for modern knee prostheses in clinical studies. The purpose of this study was to compare fixed and mobile bearing inserts in order to draw conclusions regarding clinical benefits.

Methods: The present prospective single center cohort study of 2 non-randomized stratified groups consisted of 67 patients. All included patients received cemented total knee arthroplasty (Attune®) due to osteoarthritis. 34 patients were treated with a mobile and 33 patients with a fixed insert. The WOMAC score and the Visual Analogue Scale was used for the subjective assessment of success, while the Knee-Society-Score was used considering the Range of Motion for the objective assessment. The subjective and the clinical scores showed improvements for both compared groups postoperatively at 2 years of minimum follow-up.

Results: The overall postoperative results of the WOMAC score, the Knee-Society-Score and the Visual Analogue Scale presented no statistically difference between the compared groups (p > 0,05). The postoperative ROM showed a superior improvement of 13.2° ± 18.4° in the mobile-bearing group versus 4.9° ± 18.4° (p = 0.017) in the fixed-bearing group. The flexion of the knee joint was 114° ± 10.1° for the mobile-bearings and 109.2° ± 7.2° for fixed bearings (p = 0.012).

Conclusion: According to the findings, both inserts showed overall promising postoperative results, in terms of objective as well as subjective parameters, without clinically relevant significant differences, except for ROM, which was superior in the mobile bearing group. The present clinical trial has been registered at the ISRCTN registry with the reverence number ISRCTN15117998 on 04/04/2022.

Keywords: Fixed bearing; Mobile bearing; Total knee arthroplasty.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interests.

Figures

Fig. 1
Fig. 1
Flow chart on inclusion of patients
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Bistolfi A, Massazza G, Lee GC, Deledda D, Berchialla P, Crova M. Comparison of fixed and mobile-bearing total knee arthroplasty at a mean follow-up of 116 months. J Bone Joint Surg Am. 2013;95(12):e83. doi: 10.2106/JBJS.L.00327. - DOI - PubMed
    1. Callaghan JJ, Insall JN, Greenwald AS, Dennis DA, Komistek RD, Murray DW, et al. Mobile-bearing knee replacement: concepts and results. Instr Course Lect. 2001;50:431–449. - PubMed
    1. Ferguson KB, Bailey O, Anthony I, James PJ, Stother IG, M J G B. A prospective randomised study comparing rotating platform and fixed bearing total knee arthroplasty in a cruciate substituting design--outcomes at two year follow-up. Knee. 2014;21(1):151–155. doi: 10.1016/j.knee.2013.09.007. - DOI - PubMed
    1. Kalisvaart MM, Pagnano MW, Trousdale RT, Stuart MJ, Hanssen AD. Randomized clinical trial of rotating-platform and fixed-bearing total knee arthroplasty: no clinically detectable differences at five years. J Bone Joint Surg Am. 2012;94(6):481–489. doi: 10.2106/JBJS.K.00315. - DOI - PubMed
    1. Mahoney OM, Kinsey TL, D'Errico TJ, Shen J. The John Insall award: no functional advantage of a mobile bearing posterior stabilized TKA. Clin Orthop Relat Res. 2012;470(1):33–44. doi: 10.1007/s11999-011-2114-5. - DOI - PMC - PubMed

Publication types