Our tooth is a multilayered structure.The outer most layer,ENAMEL is not a reversible structure.i.e.Once damaged with carious process,the infected tissue does not replenish.hence in such a situation it becomes important to remove the infected tissue and fill it with a viable material which becomes the integral part of that tooth.As if this carious process is not stopped,then it proceeds further to damage the pulp and surrounding tissues,causing excruciating to dull aching pain!

Basically fillings are of two types,silver filling and tooth colored filling.Either of them are filled as required and indicated.