Dentinogenesis imperfecta features?

• A. Enlarged pulp chamber.
• B. Heritable dentin defect with opalescent dentin, translucency of enamel, rapid wear.
• C. Hypoplastic enamel.
• D. Absence of dentin.

Answer: (B)

Dentinogenesis imperfecta is a hereditary defect in dentin formation. The dentin itself is abnormal, giving teeth an opalescent, bluish-gray to brown appearance, and the weakened dentin leads to rapid wear and attrition. Enamel often appears relatively normal, but because the underlying dentin is defective, the tooth surface wears quickly and the teeth can look translucent or opalescent overall. The key take-home is that the problem lies in dentin, it’s inherited, and it produces that characteristic opalescent dentin with rapid wear.

The other options don’t fit because an enlarged pulp chamber isn’t typical of this condition (pulp chambers and root canals are often reduced or obliterated due to abnormal dentin), enamel hypoplasia points to an enamel formation defect (not a dentin defect), and absence of dentin would be far more extreme than what is seen in dentinogenesis imperfecta.