The tooth is isolated from the rest of the mouth. Then a high-speed dental drill is used to remove the decay. Next, the dentist will prepare the tooth. A liner is often used to reduce tooth sensitivity. In deeper fillings, a base is used in addition to the liner. The main purpose of the base is to insulate the tooth from temperature changes in the mouth. The dentist and patient can then choose a number of different materials to fill the tooth. The most common are silver (amalgam), white (resin), porcelain, or gold. These materials are layered on top of the liner or base to finish the process of repair.
After a tooth has been filled, it is not unusual for the area to be sensitive for a day or two. In general, the deeper the filling, the more likely the tooth will be sensitive. Most fillings should be completely comfortable within two weeks. In some cases, the filling will be built up too high, causing a rough area or an improper bite. In these cases, a second appointment will be needed to shave down the filling to a comfortable level. If sensitivity lasts more than two weeks, it may indicate that there is an abscess under the filling; an x-ray will show the abscess as a space. Prolonged discomfort may also indicate a tooth that has an infected pulp; more extensive work, such as a root canal, will have to be performed.
