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This follow-up report is being submitted to relay additional and/or corrected information.The following sections were updated/corrected: b5, h6.Mdr section codes updated/corrected: a, b, c, d, e, g.The reason for the revision reported was likely due to instability, prosthesis wear, and inclusion of the polyethylene implants in the packaging recall.Possible causes for polyethylene damage include malalignment between implants, high contact stresses during knee flexion, third body wear, patient-related conditions, inclusion of the polyethylene in the packaging recall, or any combination of these possibilities.Prosthesis wear of the polyethylene components could not be confirmed from the provided information.Instability may be the result of increased soft-tissue laxity (looseness), inadequate flexion of the implants, or improper positioning or alignment of the prosthesis.If any further information is obtained that would change or alter any information provided, a supplemental report will be filed accordingly.
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