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As a result of additional information, the following fields have been updated: d1, d4, d10, g4, h4, and h6.D10.Concomitants: 200-02-35 - three peg patella 35mm sn: (b)(6).H3: investigation results - the revision reported was likely the result of prosthesis wear and osteolysis.Possible causes for polyethylene wear include malalignment between the implants, high contact stresses during knee flexion, third body wear, patient-related conditions, instability, or any combination of these possibilities.Additionally, a contributing factor to the reported wear may have been the result of being packaged in a non-conforming vacuum bag for more than five years.The extent and root cause of the prosthesis wear and osteolysis could not be determined as the device was not returned for evaluation, and images and radiographs were not provided.
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