H3, h6: the device, used in treatment, was not returned for evaluation and the reported event could not be confirmed.The clinical/medical investigation concluded that, per the revision operative report - the tibia was loose ¿ the femoral component was tight and was removed with micro-oscillating saw and osteotomes.Meniscus and bone spurs were removed on the lateral side.This was done 2 years and 8 months post implantation.No x-rays or other medical documentation was provided for the knee revision.There was no report of a trauma or incident that might have loosened the component.The impact to the patient beyond the surgery and recovery cannot be determined at this time.In conclusion, based on the limited information for this procedure, the root cause of the ¿loosening¿ of the tibial plate cannot be concluded.A complaint history review found related failures; this failure mode will be monitored for future complaints for any necessary corrective actions.A review of the risk management file and instructions for use documents revealed this failure mode was previously identified.At this time, we have no reason to suspect that the product failed to meet any product specifications at the time of manufacture.Factors and/or some potential probable causes that could contribute to the reported event have been identified as but not limited to abnormal motion over time, bone degeneration, fit/sizing, lack of ingrowth, lifetime of device, and traumatic injury.Based on this investigation, the need for corrective action is not indicated.Without the return of the actual product involved, our investigation could not proceed.Should the device or additional information be received, the complaint will be reopened.No further investigation is warranted for this complaint; however, we will continue to monitor for future complaints and investigate as necessary.We consider this investigation closed.
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