- Benign lesion of bone.
- Two types: compact (ivory) and cancellous (spongy).
- Most common sites: mandible (condyle, angle, ramus,molar region) and frontal sinus.
- Usually painless, incidental finding.
Osteoma and exostoses

Features
Differential diagnosis
- Condensing osteitis
- Idiopathic osteosclerosis (dense bone island)
- Odontoma (radiopacity)
- Sclerosing Osteomyelitis