Photo by Daniel Frank on Unsplash. License In order for tooth decay to be developed in a tooth, that tooth must have acid producing bacteria around it, along with food for the bacteria to feed upon. Teeth that are susceptible to decay will have little to no fluoride in the enamel to fight the plaque. Fluoride can destroy decay, although it won’t be able to do much once the decay has started to eat the teeth. Poor hygiene habits will allow the plaque…