(b)(4).Multiple mdr reports were filed for this event, please see associated reports: 0001822565 - 2018 - 02481, 0001822565 - 2018 - 02482.Complaint sample was evaluated and the reported event was confirmed.Visual inspection of the returned device exhibit wear and appear dull.Hardness taken is within specifications.Device history record was reviewed and no discrepancies were found.Root cause was unable to be determined.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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