The polaris 5.5 plug driver, item # 2000-9061, lot # pp97t was returned evaluation.Visual inspection of the item shows the tip of the driver has sheared off consistent with excessive torque applied to the driver.A function check of the returned item cannot be performed because the device is too damaged to engage a plug.The device history records were reviewed and no non-conformances were noted.The hardness measured at the inspection (55 rc) was within the specification for the device (rc 48 min.).The possible adverse effects 2.Loss of fixation or bending, fracture, loosening or migration of the implant or instruments are listed in the package insert.The root cause of this event cannot be conclusively determined with the available information.The probable underlying root cause for the damage is excessive torque forces leading to loss of mechanical integrity and ultimately instrument deformation and fracture.Report one of two for the same event, see also 3004485144-2015-00110.
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