Better survival, fewer manipulations found with fixed vs mobile bearing TKA

By Casey Tingle

Patients who underwent total knee arthroplasty with a fixed bearing component experienced better implant survival with respect to revision for any reason and a lower number of manipulations than patients who had a mobile bearing procedure, according to study results.

Researchers randomly assigned 146 patients undergoing total knee arthroplasty (TKA) to receive either a fixed or mobile bearing component. Patients in the fixed bearing group were also randomly assigned to receive either a normal or a deep dish insert, while patients in the mobile bearing group were randomly assigned to receive either a rotating or a rotating/translating insert.

Primary outcome parameters included knee function and walking ability measured by the Knee Society Clinical Rating Scale. Researchers performed gait analysis at baseline and at 1 year and 5 years follow-up, and measured quality of life before surgery and at 1 year and 5 years follow-up.


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