It was reported that handpiece test at the beginning of the case passed.Burred 80% of the femur.Handpiece error popped up, "check cords connection".Opened new tray and replaced anspach.Handpiece failure again.Failed homing, repetitive homing error.Replaced handpiece and used new handpiece with old drill and was able to complete case.Delay of less than 30 minutes involved.No patient injury involved.The investigation found that after the handpiece was sterilized, it failed the characterization test.These results after sterilization indicate signs of motor failure.
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