Dentigerous (follicular) cyst

Features

  • Most common odontogenic cyst, next to radicular cyst
  • It arises in the follicular region of unerupted permanent tooth.
  • It develops after fluid accumulates between the remnants of enamel organ and the tooth crown.
  • Usually adolescents, 20-40 years old.
  • Most common sites: mandibular third molar, maxillary canine, maxillary third molar.
  • Unilocular radiolucency, well-defined, often corticated, associated with the crown of an unerupted and displaced tooth.
  • Large cysts tend to expand the outer plate (usually buccally)
  • Eruption cyst is a term to describe a dentigerous cyst in children when it is situated in the soft tissues overlying the unerupted tooth.
  • Ameloblastic change may occur in the odontogenic epithelial cyst lining.

Differential diagnosis

Cases

Dentigerous cyst associated with the left upper third molar

Dentigerous cysts associated with an upper canine.

Dentigerous cysts associated with lower third molar.

Dentigerous cysts associated with a lower canine

Dentigerous cyst associated with the right upper canine.

Dentigerous cyst associated with the upper third molar.

A dentigerous cyst associated with the left lower third molar.