4 months ago I had 3 dental procedures when a crown fell off. I think it was called crown lengthening. The procedures were terribly painful, to try and save the tooth. Now, I am experiencing sores and throat irritation in the same location where a new crown was put on. I went to a second dentist for another opinion and he filed down the new crown thinking that would solve the problem of the sores and irritation, but it didn't. I have tried salt water rinses, baking soda, different tooth pastes and rinses, plantain (herb), but nothing has helped. There is no swelling or gum redness; just this trying to swallow something in the back of the mouth. Any suggestions? thanks.