Cemento-osseous dysplasia (COD) is a benign fibro-osseous lesion of bone characterized by the replacement of normal bone by fibrous tissue and subsequently followed by its calcification with osseous and cementum-like material. It arises from the fibroblasts of the periodontal ligaments.
|Orthopantamogram showing a well-defined radiopaque mass in the right mandible region extending from the distal root of 45 to the mesial root of 47 |
As per WHO, there are three clinical presentation of cemento-osseous dysplasia.
Periapical cemento-osseous dysplasia
These occur in the anterior mandible and involve only a few adjacent teeth.
Focal cemento-osseous dysplasia.
involve few teeth in posterior mandible
Florid cemento-osseous dysplasia or Familial gigantiform cementoma