This follow-up is being submitted to relay additional information.The reported event was confirmed through visual evaluation of the provided picture of the explanted product.Bone cement and biological debris can be seen on the bottom of the tibial tray however, a detailed evaluation could not be performed as product was not returned.Medical records were provided and reviewed by a health care professional.Patient had ongoing pain for one year, full extension to 100 deg.Flexion, no instability and x-rays indicate sclerosis under the tibial tray.Patient had tibial loosening and was revised to a stemmed tibia.Radiographs were provided but not reviewed as they would not enhance the investigation at this time.Device history record (dhr) was reviewed for deviations and/ or anomalies with no deviations / anomalies identified.A definitive root cause cannot 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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