In regional odontodysplasia, what is the radiographic hallmark?

• A. Ghost teeth with reduced radiodensity and enlarged pulp chambers.
• B. Intense radiodensity with thick enamel.
• C. Normal radiodensity with normal pulp.
• D. No visible teeth.

Answer: (A)

Regional odontodysplasia shows up on radiographs as ghost-like teeth. The enamel and dentin in affected teeth are underdeveloped and poorly mineralized, so the crowns appear with reduced radiodensity and look faint or translucent. Because dentin formation is defective, the pulp chambers become abnormally large for the size of the tooth, giving enlarged pulp spaces inside the pale crowns. The overall result is teeth that look ghostly on X-rays, often with short roots and eruption issues. This combination—ghost teeth with low radiodensity and enlarged pulp chambers—is the characteristic radiographic finding. The other patterns described—dense enamel, normal radiodensity, or no visible teeth—do not match how regional odontodysplasia typically presents radiographically.