Table 3 Summary of the features of cleidocranial dysplasia seen on a panoramic radiograph [6]

1. Multiple unerupted, abnormal teeth.

2. Narrow ascending ramus, with near parallel-sided anterior and posterior borders, sometimes narrowing towards the coronoid process and condyle.

3. Slender, pointed coronoid process often facing upwards and posteriorly.

4. Thin zygomatic arch with a severe downward tilt, sometimes discontinuous at the site of the zygomatico-temporal suture.

5. Maxillary sinuses very small or absent. The infra-orbital rim appears lower than normal in relation to the teeth.

6. Downward tilting floor of nose at the site of the anterior nasal spine to a marked V-shape.

7. Coarse trabeculation of mandible.

8. Increased density of alveolar crestal bone overlying unerupted teeth.

9. Increased density of the ascending ramus between the anterior border of the mandible and the inferior dental canal.