Dental fillings refer to the process of restoring the structure and function of teeth by using materials that are non reactive and resistant in filling cavities and repairing other tooth defects such that they could perform as normal teeth again. Gold and other metal amalgams have traditionally been used to fill teeth. Because of their strength, they are usually used to restore the back teeth because of they are most active in chewing. The front teeth are usually filled with porcelain or composite materials that look like natural teeth in colour and are more aesthetically pleasing. Dental fillings can be carried out in one or two sittings depending on the severity of the case. They are important in oral health because filling cavities stop the progression of tooth decay which may lead to loss of teeth or in severe cases the bacteria in the diseased tooth may spread to other parts of the body.