Cemento osseous dysplasia



  • Proliferation of fibrous tissue and bone and/or cementum.
  • Occurs in tooth-bearing parts of jaws.
  • Pathogenesis unknown: may originate in PDL, may be defect in extra-ligamentary bone remodeling.
  • Most common fibro-osseous lesion.
  • Asymptomatic: no pain or enlargement (unless inflamed due to exposure of lesion).
  • Usually occurs in periapical region of anterior mandible.
  • Usually multiple, discrete lesions; may be solitary.
  • Strong predilection for women (at least 10:1 over men).
  • Approximately 70% in blacks.
  • Most arise between 30 and 50; rare before age 20.
  • Location: Usually multiple lesions, epicenter at apices or apical 1/3 of roots (in alveolar process)
  • Observations:
    • Usually well defined radiolucencies.
    • Generally no more than 1 cm.
    • Often resorb lamina dura.



















Mixed stage



Mixed stage



Mixed stage



Radiopaque stage



Radiopaque stage



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