MINER WAS USING A PRY BAR TO LIFT UP THE LATCH OF A PINTLE HITCH. THE PRY BAR LOST PURCHASE ON THE LATCH WHILE THE MINER WAS PUSHING DOWN ON THE END OF THE BAR RESULTING IN THE LOSS OF BALANCE. MINER FELL FORWARD AND STRUCK THEIR FACE ON THE TOP SUPPORT BAR OF A MUDFLAP RESULTING IN THE DISLODGEMENT OF A DENTAL CROWN. THE UNDERLYING TOOTH WAS CHIPPED AND STILL AFFIXED TO THE CROWN.