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)
- Usually well defined radiolucencies.
- Generally no more than 1 cm.
- Often resorb lamina dura.