A filling is a process to restore a tooth which damaged by decay and back to its normal function, shape. Tooth Fillings is used to treat a cavity. In this procedure, the decayed portion of the tooth removed and then "fill" the area where the decayed material was removed. It also can be used to repair damage to teeth caused by teeth grinding or to replace part of a broken tooth. Dentists use different types of tooth fillings include gold, silver amalgam, tooth-colored composite material, porcelain, and a special type of glass.