Idiopathic osteosclerosis is a common incidental finding on dental imaging.
Idiopathic sclerosis is also known as dense bone islands, enostoses, bone scar or focal periapical osteopetrosis .
Idiopathic sclerosis is detected on ~5% (range 4-31%) of dental imaging .
The etiology is unknown but is considered developmental and not inflammatory in nature . Most commonly (90%) in the mandible near the first molar .
Idiopathic osteosclerosis may be seen on OPG (orthopantomogram), or cone-beam or dental CT :
- usually solitary but can be multiple
- size: 2-3 mm to 1-2 cm
- round, oval or irregular
- sharp margins without a radiolucent rim
- periapical (80%) or remote to teeth (20%)
- condensing osteitis: occurs due to chronic inflammation and is often associated with caries, non-vital teeth and other inflammatory lesions