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The articular surface of the Freedom femoral components were designed to mimic anatomical knee function.
As flexion increases, the radius of the curvature in the sagittal plane must change to accommodate more or less rollback over the available surface.
1Durbhakula S, Durbhakula V, Durbhakula N, Restoration of Femoral condylar Anatomy for Achieving Optimum Functional Expectations Continuation of an Earlier Study at 5-Year Minimum Follow-Up. JSIRF, 2019, Vol 9
1Mhlaba, et al: Surgical Instrumentation: The True Cost of Instrument Trays and a Potential Strategy for Optimization. J Am Coll Surg, 219(4):646-655, 2014