EE WAS WORKING ON REPLACING AN AIRSLIDE @ TOP OF TRUCK LOADING SILOS LOCATED @ PACKHOUSE. HE WAS TIGHTENING BOLTS ALONG SEAM OF AIRSLIDE WHEN WRENCH SLIPPED OFF & HE STRUCK HIMSELF IN THE MOUT H W/WRENCH. THIS RESULTED IN CHIPPING HIS UPPER LEFT MOLAR. FILED A WORKERS COMP CLAIM 2/21/02 TO VISIT DENTIST.