(b)(4).Date of birth patient was born in 1940.Concomitant medical products: vanguard xp femoral, cat#: 195214 lot#: 277150, vanguard xp lateral tibial bearing, cat#: 195814 lot#: 519100, vanguard xp medial tibial bearing, cat#: 195884 lot#: 433390.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: 0001825034-2017-07884, 0001825034-2017-07885, 0001825034-2017-07886, 0001825034-2017-07887.
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