October 28, 2014
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Positive results seen in TKA using mobile-, fixed-bearing prostheses

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Recently published data indicated the utilization of both mobile- and fixed-bearing prostheses in total knee arthroplasty can yield positive clinical and radiographic outcomes for patients.

Researchers investigated 444 patients who underwent simultaneous bilateral total knee arthroplasty (TKA), where one side was treated immediately after the other. Patients were given a mobile-bearing prosthesis on one side and a fixed-bearing prosthesis on the other. Minimum length of follow-up was 10 years.

All patients underwent clinical and radiographic evaluation at each follow-up. Metrics analyzed included WOMAC, total knee scores and UCLA activity values, as well as range of motion and survival rate with revision.
At final follow-up, no significant differences were noted between either the mobile- or fixed-bearing prostheses in postoperative WOMAC (19 and 18 points, respectively), UCLA activity (five points in each cohort) or total knee values (95 and 94, respectively), according to the researchers.

Additionally, no significant variations were seen in radiographic assessment, range of motion (129° and 127°, respectively), aseptic loosening (1.4% and 1.8%, respectively) or estimated survival rate with revision as the endpoint (98.2% and 97.5%, respectively) between mobile- and fixed-bearing prostheses at final follow-up.

None of the knees in either group were found to have osteolysis, according to the researchers.

Disclosures: The authors have no relevant financial disclosures.