I have been liked a caged animal since Saturday when I had this crown preparation on the upper right molar. I was fine before. Now I have mouth ulcers for the first time in my life (it may have been from my scratching the gum by pulling back and looking) and the vein/gum immediately above this so called preparation – with its alarming gap – is swollen and I’m finding it impossible to keep clean. Can anyone help me. Try as I continually may. I’ve called but am told I should just be patient and everything will be fine. I’m finding that hard to believe. It is now going into the sixth day …. and the swelling continues. I am fearful. Sincerely so.