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Better outcomes associated with all-polyethylene tibial components during TKA
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Patients who received all-polyethylene tibial components during primary total knee arthroplasty experienced better outcomes compared with those who received metal-backed modular components, according to study results.
From 1985 to 2005, 16,584 primary total knee arthroplasties were performed in 11,992 patients. Researchers retrospectively reviewed and compared overall revision rates and revisions for aseptic loosening, wear and osteolysis across 22 tibial implant designs using Cox proportional hazards regression models adjusting for age, sex, calendar year and body mass index.
Study results showed all-polyethylene tibial components had a significantly lower risk of revision vs. metal-backed modular implants. Age, sex and body mass index had no effect on risk reduction with all-polyethylene tibial components, according to the researchers.
Cruciate-retaining knees were found to perform better than the posterior-stabilized knees when metal-backed modular tibial components were used; however, this finding was limited to the use of one particular component design.
No survivorship difference between cruciate-retaining and posterior-stabilized designs was found with all-polyethylene tibial components, according to the researchers.
Disclosure: See the study for a full list of all authors’ relevant financial disclosures.
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