Approximately 500 million dental visits occur each year in the United States, and they come at a hefty price: The nation spent an estimated $108 billion on dental services in 2010.1 Dental caries, commonly known as tooth decay, is an oral disease in which the acid generated by oral bacteria cause damage to hard tooth structure. It is one of the most common infectious diseases among American children and adults, and remains one of the most common diseases throughout the world.