(b)(4).Multiple mdr reports were filed for this event, please see associated reports: 0001822565-2022-01083.Implant date: unknown date in 2019.Concomitant medical products: medical devices: unknown femoral catalog #: ni, lot#: ni.Unknown tibial insert catalog#: ni, lot#: ni.Customer has indicated that the product will not be returned to zimmer biomet for investigation, as it remains implanted.The investigation is in process.Once the investigation has been completed, a follow-up mdr will be submitted.
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