I've gotten 2 of my fillings replaced, because they were old. (No pain previously.) After the fillings were replaced, I've had to return to the dentist 3 times to get my bite adjusted because the teeth were now causing me pain. She made it sound like this was a pretty common problem, but I'm not so convinced. I would think a dentist should know how to file down the teeth so they weren't so "high". Should I get a new dentist?