IT WAS REPORTED THAT DURING A THR PROCEDURE, UPON IMPACTING THE HEAD ON TO THE FEMORAL IMPLANT THE IMPACTOR'S BLACK PLASTIC PART BROKE OVER THE INCISION. THE PIECE WAS FOUND AND NOTHING WAS LEFT IN THE PATIENT. THE HEAD WAS FIRMLY ATTACHED TO THE STEM. THERE WAS AN S&N BACKUP DEVICE AVAILABLE. THERE WERE NO DELAYS IN THE PROCEDURE AND NO PATIENT INJURY.