Supernumerary teeth

Dr Daniel J Bell and Dr Henry Knipe et al.

Supernumerary teeth (hyperdontia) are teeth additional to the standard primary or permanent dentition.

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.

Multiple supernumerary teeth are associated with 2,3:

The etiology 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
Anatomy: Head and neck

Anatomy: Head and neck

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

  • Figure 1: intra-oral photograph
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  • Case 1
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  • Case 2: mesiodens
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  • Case 3
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  • Case 4: supplemental tooth
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  • Case 5: cone beam CT
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  • Supernumerary nasal tooth
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