The cause of caries is bacterial breakdown of the hard tissues of the teeth (enamel, dentin and cementum). This occurs due to acid made from food debris or sugar on the tooth surface. Simple sugars in food are these bacteria's primary energy source and thus a diet high in simple sugar is a risk factor.
Bedford County, Tennessee (TN) County population in 2014: 46,627 (44% urban, 56% rural); it was 37,586 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 7,508. County owner-occupied free and clear houses and condos in 2010: 4,026. County owner-occupied houses and condos in 2000: 10,223.
Knox County, Tennessee. Knox County is a county in the U.S. state of Tennessee. As of the 2010 census, the population is 432,226. Its county seat and largest city is Knoxville. The county is at the geographical center of the Great Valley of East Tennessee. Near the heart of the county is the origin of the Tennessee River at the union of the Holston and French Broad Rivers.