(b)(4).Concomitant medical products: vanguard xp interlok femoral, cat#: 195204, lot#: 504620; vanguard xp lateral tibial bearing, cat#: 195782, lot#: 968980; vanguard xp medial tibial bearing, cat#: 195853, lot#: 499390.Customer has indicated that the product will not be returned to zimmer biomet for investigation, as product location is unknown.The investigation is in process.Once the investigation has been completed, a follow-up mdr will be submitted.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.Multiple mdr reports were filed for this event, please see associated reports: 0001825034-2017-07944, 0001825034-2017-07946, 0001825034-2017-07947.
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