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Correction to d4 (gtin), d6a (date of implant), and h6(device code and conclusion code).The reported event could not be confirmed, since the device was not returned for evaluation and no other evidences were provided.The device inspection was not possible as the product was not returned for investigation.A review of the device history for the reported lot did not indicate any abnormalities.No corrective actions are required at this time.No indications of material, manufacturing or design related problems were found during the investigation.A review of the labeling did not indicate any abnormalities.Upon further investigation of the ct scans, healthcare professionals opined that- the loosening and subsidence of the talus can be confirmed with the provided ct scan.The tibia, however, does not look loosened or otherwise altered.There is no clear radiolucence or cysts.The underlying cause is probably patient related due to poor bone substance.However; failure of total ankle replacement (tar) over time is a known complication.In case of a planned revision procedure a medical opinion aiming to determine the root cause of the failure is part of the internal investigation process.Sufficient (radiological and clinical) information must be provided to enable a meaningful clinical assessment and to identify possible causes of failure.In cases where a ct scan is the only available clinical source, this assessment is limited.No conclusive statement can be provided, because key clinical information (e.G.Clinical status, exact symptoms and range of motion of the patient, assessment of the treating physician) is missing.The root causes of radiographic findings such as radiolucent areas and bone cysts are often complex and multifactorial and cannot be determined scientifically without this decisive evidence.Based on the investigation the failure is most likely due to patient related issue i.E.Poor bone quality.If device is returned or any further information is provided, the investigation report will be reassessed.
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