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Schematic showing differences between standard posterior stabilized (white, background) and high-flex posterior stabilized (gray, foreground) polyethylene inserts. (A) The cutout of polyethylene at the anterior aspect of the inserts is shown. (B) The slope of the polyethylene at the proximal anterior portion of the post is demonstrated. (C) Changes in the radius of curvature of the posterior portion of the articulating surfaces are shown.
