Food debris + saliva = plaque tartar + acids in plaque =
cavities or tooth decay.
number of micro-organisms are present in our mouth. Bacteria are commonest
among them. Enzymes produced by these bacteria convert all foods-especially
sugar and starch into acids.
Bacteria, acid, food debris, and saliva combine in the
mouth to form a sticky substance called plaque
that adheres to the teeth.
Plaque that is not removed from the teeth becomes a hard substance called tartar
. Plaque and tartar irritate the
gums. The acids in plaque can dissolve
the enamel surface of the tooth and create holes in the tooth (cavities)