EMPLOYEE WAS INSTALLING A CLAMP ON A STEEL CABLE. THE NUT WAS STARTED ON THE U-BOLT. INDIVIDUAL RELEASED HIS HOLD AND REACHED FOR A WRENCH TO COMPLETE TIGHTENING THE NUT. NUT CAME OFF, RELEASING THE U-BOLT WHICH STRUCK THE EMPLOYEE, CHIPPING HIS UPPER FRONT TEETH. EMPLOYEE DID NOT VISIT THE DENTIST UNTIL 03/16/2012 AT WHICH TIME HE HAD THE TEETH REPAIRED.