Felt a pop on tooth above RC after opening my mouth to remove the gummy stuff placed to remove the bottom crown. I said I hope that didn't move the top crown. He said "it won't." He was aware the top crown never felt right before starting. Bite is completely off. Front and left teeth barely touch or not at all. He asked if my teeth were touching together on left side. I said I'm not really sure I was too numb. Went on to next patient. Gave no RX & top tooth is very painful now.