An event regarding wear involving a triathlon insert was reported.The event was confirmed by material analysis of the returned device.Method & results: device evaluation and results: one insert was returned for evaluation.Burnishing, scratching and third-body indentations were observed on the insert condyles these are common damage modes of uhmwpe.A material analysis has been performed.The report concluded: damage was observed on the condyles of the femoral component, consistent with contact against a hard object.Burnishing, scratching and third-body indentations were observed on the insert condyles.These are common damage modes of uhmwpe.Eds analysis showed the femoral component and baseplate were consistent with astm f75 alloy.Biological fixation was observed on the femoral component and baseplate.Based on the given information, no identifiable materials or manufacturing discrepancies were observed on the surfaces examined.Medical records received and evaluation: no medical records were received for review with a clinical consultant.Device history review: device history review indicated the devices accepted into final stock from the reported lot were free from discrepancies.Complaint history review: there have been no other similar events for the reported lot.Conclusions: the exact cause of the event could not be determined because insufficient information was provided.Additional information including operative reports, progress notes, x-rays as well as patient history and follow up notes are required to complete the investigation for determining a root cause.No further investigation is required at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.
|