May Be Caused by

 Common

Bone island

Cementoosseous dysplasia

Chronic osteomyelitis

Complex odontoma

Exostosis

Garré sclerosing osteomyelitis

Idiopathic osteosclerosis

Impacted tooth

Ossifying subperiosteal hematoma

Osteoma

Pyogenic osteomyelitis with sequestrum

Retained tooth root

Sclerosing osteitis

Supernumerary tooth

Torus mandibularis

Torus palatinus

Unerupted tooth

 Uncommon

Avascular necrosis

Bone sarcoma

Cementoossifying fibroma

Chondroma

Chondrosarcoma

Fibrous dysplasia

Foreign body

Hemangioma

Langerhans cell histiocytosis

Lymphoma

Ossifying fibroma

Ossifying postsurgical bone defect

Osteoblastic metastasis

Osteoblastoma

Osteoid osteoma

Osteosarcoma

Paget disease of bone