Pathology · single question
DAY 2 — CASE 2: A patient presents with obliteration of pulp chambers and bulbous crowns. What is the correct diagnosis?
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Correct answer: A. Dentinogenesis imperfecta type I
- A. DENTINOGENESIS IMPERFECTA TYPE I (DI Type I) occurs in conjunction with osteogenesis imperfecta (OI). Features: bulbous (bell-shaped) crowns, cervical constriction, early obliteration of pulp chambers and root canals, opalescent (blue-gray/amber translucent) teeth, enamel chips off easily due to poor DEJ bonding.
- B. Dentinogenesis imperfecta type II (Shields type II) = hereditary opalescent dentin without OI — similar dental features but no systemic bone disease. Both DI types show pulp obliteration, but the presence of OI features (if mentioned) distinguishes Type I from II.
- C. Amelogenesis imperfecta (AI) affects ENAMEL formation — not pulp chambers or crown shape. Not the diagnosis here.
- D. Same as above — AI type II (hypomaturation) affects enamel, not pulp obliteration.