When repairing a small cavity, a composite filling can restore your tooth to shape and function while also mimicking its natural shade. During the first step, your tooth is prepared by removing the decayed portion, leaving a small prepared area that will be filled with the composite. Next, a special bonding agent is applied to the prepared area. This bonding process helps ensure that the filling will attach to the natural tooth structure. A special curing light is then used to set the bonding fluid. Your doctor then applies the composite material to fill the prepared area and shapes it to match the contours of your tooth surface. Again, using the special curing light, the shaped composite is solidified into place. As a final step, your doctor will polish the composite filling to smoothen it and give it a similar sheen to the rest of your tooth. Once completed, your tooth is free of decay and restored to its optimal strength and appearance.