All know the annoying symptoms of decay: awareness of the party attacked by the bacteria, particularly in the presence of physical stimuli, such as hot and cold, or chemical (sugars). As the decay falls deeply feel neuralgia, of varying intensity and incident on the trigeminal, nerve on the mandibular or maxillary nerve, as the tooth concerned. These symptoms, however, are a wake-up alarm sounded too late, because it means that the decay has advanced, adversely affect the first dentine, up to the dental pulp: in this case, the pain can be very intense as the pulp, rich of nerve endings and blood vessels, remains discovery and therefore tends to ignite and become infected, coming into contact with external stimuli.
If the decay is at an early stage or superficial, it can not cause any discomfort or only cause a greater sensitivity of the tooth, when masticano particularly sweet foods, salty or sour. It is indeed visible only after careful observation of the tooth, which can be particularly difficult, for example, if caries is in a tooth placed in the bottom of the oral cavity, or the point of junction between two teeth, especially at a point particularly close, or at an early stage.