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The Apollo Knee System Single Lug Patella is designed to articulate with the various tibial and femoral components of the Apollo Total Knee System. The Single Lug Patella is a one piece component manufactured from ultra-high molecular weight polyethylene (UHMWPE, ASTM F648). The design incorporates a large, round, centrally placed, single lug on the back of the component for fixation. A concentric cement groove is incorporated into the stem of the single lug to aid in cement adhesion. A discontinuous dovetail cement groove has also been incorporated into the flat surface on the back of the patella to aid in achieving a bone cement "macro-lock" and to assist in rotational stability of the implant. The component will be available in a 28mm round design as well as 29mmX32mm, 32mmX35mm, and 35mmX38mm elliptically shaped design.

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