A group of hereditary disorders affecting tooth development. There are at least 14 known subtypes that involve varying degrees of abnormalities in tooth structure and enamel including discoloration, pitting, grooving, hypoplasia, hypocalcification, small teeth, and teeth that are sensitive and prone to breakage. This condition typically affects all teeth in a mostly equal manner and can occur in association with other generalized syndromes or without other signs or symptoms. Treatment is dependent on the exact phenotype and can require substantial clinical and emotional support. Good oral hygiene from a young age is essential for best outcome. Typical interventions including bonding and crown restoration.