In dentistry, anodontia, also called anodontia vera, is a rare genetic disorder characterized by the congenital absence of all primary or permanent teeth. It is associated with the group of skin and nerve syndromes called the ectodermal dysplasias. Anodontia is usually part of a syndrome and seldom occurs as an isolated entity. X-rays can reveal if a person has cavities Dentistry is the practical application of knowledge of dental science (the science of placement, arrangement, function of teeth and their supporting bones and soft tissues) to human beings. ... A genetic disorder, or genetic disease is a disease caused by abnormal expression of one or more genes in a person causing a clinical phenotype. ... A congenital disorder is a medical condition that is present at birth. ... ... Permanent teeth are the second set of teeth formed in humans. ... Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ... In medicine, the term syndrome is the association of several clinically recognizable features, signs, symptoms, phenomena or characteristics which often occur together, so that the presence of one feature alerts the physician to the presence of the others. ... The Ectodermal Dysplasias are describes as heritable conditions in which there are abnormalities of two or more ectodermal structures such as the hair, teeth, nails, sweat glands, cranial-facial structure, digits and other parts of the body. ...

Partial anodontia, known as hypodontia or oligodontia, is the congenital absence of one or more teeth. Congenital absence of all wisdom teeth, or third molars, is relatively common. In dentistry, hypodontia is the condition of naturally having fewer than the regular number of teeth. ... Wisdom teeth are third molars that usually appear between the ages of 18 and 20 (although they may appear when older, younger, or fail to appear at all). ... Molar 47 (left), molar 46 and premolar 45(right) Molars are the rearmost and most complicated kind of tooth in most mammals. ...

See also

• hyperdontia, meaning more than the usual number of teeth