Supernumerary teeth

Dr Dalia Ibrahim and Dr Henry Knipe et al.

Supernumerary teeth (hyperdontia) are additional 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.

The aetiology of supernumerary teeth is unknown 3. They may arise anywhere in the mandible or maxilla and may be:

  • unilateral or bilateral
  • single or multiple
  • erupted or unerupted

Multiple supernumerary teeth are associated with 2, 3:

Head and neck anatomy
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Article information

rID: 29679
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Hyperdontia
  • Supplemental teeth
  • Supplemental tooth
  • Accessory tooth
  • Peridens
  • Supernumerary tooth

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Cases and figures

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    Figure 1: intra-oral photograph
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    Case 1
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    Case 2: mesiodens
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    Panoramic radiogr...
    Case 3
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    Case 4: supplemental tooth
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    Case 5: cone beam CT
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    Case 6
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