It is claimed that the most widespread dental disease is caries.The diet, proper hygiene and regular checks by specialists (every six months) are the basis for proper prevention against tooth decay. The sweet foods, the soft bread, the appetizers, which stick to the teeth, allow the bacteria to release an acid that attacks the enamel. In the initial phase the caries appears as a small white spot (demineralization, lack of calcium and phosphorus). In this phase the most resistant layer of the tooth, the enamel, is attacked, therefore no pain is perceived and the caries extends. The streptococcus mutans bacterium penetrates deep into the dentin and in width affecting the entire tooth structure. At this stage you start to feel pain. Caries is an infectious disease that can be the cause of other diseases outside our mouth.