Dental Caries is one of the most common infectious dental disease known to man. The three main factors which are responsible for the tooth decay are (1) host i.e. Tooth (2) microbes i.e. Bacteria (3) diet i.e. Carbohydrates.
Diet plays a major role in caries process. The microbes they ferment food which comes from the diet to produce acid . this acid then dissolves the tooth surface producing caries. If one has a susceptible tooth surface and the bacteria which causes caries but no cariogenic diet , then that tooth cannot get caries. So we see that diet plays a major role in carious process.