Mobile- vs. fixed-bearing total knee replacement.

ABSTRACT:

Background and purpose

It is unclear whether mobile-bearing (MB) total knee arthroplasties reduce the risk of tibial component loosening compared to fixed-bearing (FB) designs. This randomized study investigated implant migration, periprosthetic bone mineral density (BMD), and patient-reported outcomes (Oxford knee score)-all at 2 years-for the P.F.C. Sigma Cruciate Retaining total knee arthroplasty.

Patients and methods

50 osteoarthritis patients were allocated to either FB or MB tibial articulation.

Results and interpretation

At 2 years, the mean total translation (implant migration) was higher for the FB implant (0.30 mm, SD 0.22) than for the MB implant (0.17 mm, SD 0.09) (p = 0.04). BMD decreased between baseline and 1-year follow-up. At 2-year follow-up, BMD was

SUBMITTER: Tjornild M 

PROVIDER: S-EPMC4404772 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature