Caries is no longer seen as an infectious disease, and the aim of treating carious lesions is to control their activity, not to remove the lesion itself. Such control can be implemented by sealing off the lesion from the environment, with sealed bacteria being deprived from carbohydrates and thus
Teeth are colonized by oral bacteria from saliva containing more than 700 different bacterial species. If removed regularly, the dental biofilm mainly comprises oral streptococci and is regarded as resident microflora. But if left undisturbed, a complex biofilm containing up to 100 bacterial species