The composite filling is the best way to repair tooth cavities and holes. A simple process is conducted in which the decayed portion of tooth is removed which leaves a small area to be filled with composite filling. After removal of cavity, a bonding fluid is used to make sure that fluid attaches itself to the natural structure of the root. The area is then filled with composite filling and shapes it so that it matches the tooth surface. Dentists use a special curing light to harden the composite and finally polish it to match it with the rest of teeth. The tooth is now restored to its natural strength and appearance leaving it free from decay.