Q. Dear Dr. Moore, I had 3 upper left molars replaced by pins/crowns, and 2 lower left molars replaced by crowns, and a cantilever bridge placed where a tooth was missing. They were done last year and I have noticed that my front teeth does all the grinding of food. Also recently when I chew my incisors are biting into the inner tissue of my lip? I still need to have two crowns to replace one upper and one lower right molar. Can height be added to crowns once they are put in place? Many thanks.