An event regarding revision for unspecified reason involving an unknown knee implant was reported.The event was not confirmed.Conclusions: the exact cause of the event could not be determined because insufficient information was provided.Further information such as device lot details, return of the device, pathology reports, pre- and post-operative x-rays and the primary operative report as well as patient history and follow-up notes are needed to complete the investigation for determining root cause.No further investigation for this event is possible at this time.If devices and / or additional information become available to indicate further evaluation is warranted, this record will be reopened.Not returned.
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