Tooth wear caused by tooth-to-tooth contact is termed attrition. Dental anatomy is a field of anatomy dedicated to the study of tooth structure. Dental anatomy is a field of anatomy dedicated to the study of human tooth structures. Cementum is a specialized bone like substance covering the root of a tooth. Hydroxyapatite is the main component of tooth enamel. Affected enamel has a different translucency than the rest of the tooth. Valsalva is also used by dentists following extraction of a maxillary molar tooth. Enamel formation is part of the overall process of tooth development. It is also present in some tooth bleaching formulas. Fluoride exerts its major effect by interfering with the demineralization mechanism of tooth decay. It then drains out of an opening at the rear of the maxillary tooth. Pericoronitis is an infection of the operculum of a partially impacted wisdom tooth. This victim is known to have suffered from an abscessed tooth. Methadone has been implicated in contributing to significant tooth decay. The views on the most effective method for community prevention of tooth decay are mixed.