An event regarding loosening involving an avon patella-femoral component was reported.The event was not confirmed.Method and results: device evaluation and results: not performed as the product was not returned.Medical records received and evaluation: not performed as medical records were not provided.Device history review: the device was manufactured and accepted into final stock with no reported discrepancies.Complaint history review: there were no other events for the reported lot.Conclusions: the exact cause of the event could not be determined due to insufficient provision of information.Further information such as: returned device, pre- and post-operative x-rays, primary and revision operative reports as well as patient history and follow-up notes are needed to complete the investigation to determine root cause.
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