Supernumerary teeth (hyperdontia) are teeth that are in addition to the normal number of either primary or permanent teeth.
The term supplemental tooth may be used when the supernumerary tooth resembles its associated normal tooth and the term peridens may be used for an ectopically erupted (e.g. buccal or lingually) supernumerary tooth 3. Mesiodens refers to a supernumerary tooth in the midline between the central incisors 4.
Supernumerary teeth occur in ~2.5% (range 0.1-5.3%) of the population with a 2:1 M:F in adults with permanent teeth 1, 3.
- unilateral or bilateral
- single or multiple
- erupted or unerupted
Multiple supernumerary teeth are associated with 2, 3: