The received device was determined to have been manufactured prior to 1986, based on the format of the item number inscribed on the device.The upper jaw of the device was broken off.The instrument was analyzed using a digital microscope by (b)(4).The analysis of the fracture pattern illustrated a forced fracture due to overload.No pores, inclusions or foreign bodies could be found on the point of rupture.The forced fracture is also confirmed by the bent rod near the breakage.Most likely the rongeur was used under torsional force while gripping.Based on the information available as well as a result of our investigation the root cause of the failure is most probably user related.Corrective/preventive action is not required.
|