It was reported that the patient underwent a left hip revision due to metallosis, and damage to the abductor and short external rotator muscles approximately 9 years post implantation.During the revision, as the acetabulum was well fixed, the locking ring broke while trying to be removed.The stem and shell were left intact, and all other components were replaced.Large amount of clear synovial fluid drained from hip joint and synovial tissue and muscle stained yellow with chronic fibrous changes due to metallosis process.No further complications were reported.Attempts have been made and additional information on the reported event is unavailable.
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This follow-up report is being submitted to relay additional information.The following sections were updated/corrected updated: b4, b5, d4, g3, g6, h2, h3, h6, h10 corrected: d4: udi#: not applicable h6: component code: mechanical (g04)-stem medical records were provided and reviewed by a health care professional.Review of the available records identified the following: the patient underwent a revision due to metallosis and elevated metal ions.During the revision, significant damage was found to the surrounding muscles and tissues of the left hip.Additionally, pitting was found on the trunnion of the stem, but was deemed acceptable to remain implanted.While attempting to remove the liner, it was found the locking ring was stuck in place and was broken in order to remove it.A new zimmer head, locking ring, and liner were implanted with no complications noted.Device history record was reviewed and no discrepancies relevant to the reported event 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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