In dentistry, hyperdontia is the condition of having supernumerary teeth, teeth which appear in addition to the regular number of teeth. The occurrence of hyperdontia ranges from 0.1% to 3.8% in various populations. There is evidence of hereditary factors along with some evidence of environmental factors leading to this condition. Many supernumerary teeth never erupt, but they may delay eruption of nearby teeth or cause other dental problems. Molar-type extra teeth are the rarest form. Dental X-rays are often used to diagnose hyperdontia.

A similar condition is hypodontia, in which there are fewer than the usual number of teeth.

Hyperdontia was a common genetic trait among certain Native American tribes that existed prior to 2000 BCE, with every individual in the tribe having a full double set of teeth.

Hyperdontia is sometimes a part of cleidocranial dysostosis.

External links

• Image of hyperdontia

Oral pathology | Supernumerary body parts

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