If the filling is cracked, old and discoloured, or some of it has chipped away, it is a sign to replace the old filling. Other than that, if your tooth hurts or is sensitive, it could also be a sign to replace the old filling. At Admire Dentistry, we take intraoral photos of all your teeth so that you can clearly see and understand what we are assessing. We give you the knowledge so that you can make the best treatment decision for your mouth.