A. Hi, If you have felt a crack on eating I would definitely book an appointent with your dentist just to makesure all is well in your mouth and jaw joints. Often you can feel a hole in your mouth if a tooth/filling is cracked. This may or may not feel sensitive or painful. Sometimes you may not even notice a crack in a filling and the first time it comes to light is when your dentist notices it. So my advice is to phone your dentist tomorrow and put your mind at rest. Hope this helps, Sunita