(b)(4).This follow-up report is being submitted to relay additional information.(b)(4).Complaint sample was evaluated and the reported event was not confirmed.The locking ring was positioned inside the liner as designed.Neither the liner or locking ring shows signs of damage or wear that would indicate an attempt to implant was made.Device history record (dhr) 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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