Examine the radiographs. The crowns show generalized thin/poorly mineralized enamel with normal-appearing dentin and pulp chambers. Despite apices that look open, the best diagnosis is:

Correct answer: C. Amelogenesis imperfecta

• A. Dentin dysplasia shows pulpal/root abnormalities, not primarily enamel.
• B. Dentinogenesis imperfecta shows opalescent dentin and obliterated pulps.
• C. Correct. Generalized enamel defect with otherwise normal dentin/pulp = amelogenesis imperfecta. Do not be misled by apices that appear open.
• D. Regional odontodysplasia is localized ('ghost teeth'), not generalized.