Jaw Bone Pathology: Fibro-Osseous Lesions

  • Reactive/dysplastic/neoplastic lesions → replacement of normal bone by fibrous tissue
  • Contains mineralized product – deposited by metaplastic cells (derived from the fibrous tissue)
  • Include:
    • Dystrophic normal bone
    • Dense sclerotic cementum-like calcifications
    • Or mixed hard tissues

Common fibro-osseous lesions

  1. Fibrous dysplasia of bone
  2. Cemento-osseous dysplasia
    • Periapical cemento-osseous dysplasia
    • Focal COD.
    • Florid COD – all 4 quadrants
  3. Ossifying fibroma
  4. Cherubism – Hereditary craniofacial malformations

Common radiology

  • Early – well circumscribed radiolucencies.
  • Late – mixed radiolucency to ”cotton wool” appearance

Difference between fibrous dysplasia and ossifying fibroma

Difference between ossifying fibroma and fibrous dysplasia