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.
As of 2010, Shelby County was both Tennessee's most populous county, with 927,644 residents, and the largest county in area, covering an area of 755 sq mi (1,955 km2). The least populous county was Pickett County (4,945) and the smallest in area was Trousdale County, covering 114 sq mi (295 km2).