The instrument was analyzed by microscope.The analysis of the fracture pattern illustrated a forced fracture due to overload.The visible damages on both parts of the jaw also confirm the overload situation.No pores, inclusions or foreign bodies could be found.The brushed surface indicates that the instrument was maintained.The device quality and manufacturing history records is not possible.Based on the information available as well as a result of the investigation, root cause of the failure is most probably user related.The breakage of the device maybe the result of maintenance of the third-party service, or surgery by overstressing the instrument due to bending or leverage.The current failure is within the risk analysis and therefore acceptable.
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