(b)(4).Brand name: femoral stem 12/14 neck taper plasma sprayed press-fit cementless size 10 extended offset.Concomitant medical products: 00630505036, liner standard 3.5 mm offset 36 mm i.D., 62328404.00801803602, femoral head sterile product, 62378517.00625006530, bone scr 6.5x30 self-tap, 62318802.00620005222, shell porous with cluster holes 52 mm o.D., 62268615.Customer has indicated that the product will not be returned to zimmer biomet for investigation.The investigation is in process.Once the investigation has been completed, a follow-up mdr will be submitted.Multiple mdr reports were filed for this event, please see associated reports: 0002648920 - 2019 - 00777, head.0002648920 - 2019 - 00778, screw.0002648920 - 2019 - 00779, shell.
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It was reported that the patient underwent a revision surgery four years post initial tha due to a loose acetabular component.During the surgery, it was discovered that there were indications of corrosion on the head and stem.Attempts were made to obtain additional information; however, none was available.
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(b)(4).This follow-up report is being submitted to relay additional information.Reported event was confirmed by review of medical records.Device history record (dhr) was reviewed and no discrepancies were found.Root cause was unable to be determined.Initial op notes demonstrated that the patient had right tha due to degenerative joint disease.No complications and only one screw was installed.Revision op notes demonstrated that the patient was revised due to cup loosening and subsidence with bone loss.During the revision, milky turbid fluid in the joint, the cup rotated 90 degrees from its ideal location.Stem well fixed.Corrosion on the trunnion.Broken screws in the acetabulum.Necrotic tissue.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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