A patient with osteogenesis imperfecta presents with blue-grey teeth with obliterated pulp chambers on radiograph. This dental finding is associated with:

Correct answer: D. Dentinogenesis imperfecta type I (DI-I, associated with OI)

• A. Dentin dysplasia type II shows 'thistle-tube' pulp chambers in permanent teeth and is not associated with OI.
• B. DI-II (isolated DI, also called hereditary opalescent dentin) is NOT associated with OI — it occurs independently without systemic bone disease.
• C. Dentin dysplasia type I presents with nearly obliterated pulp chambers with rootless or very short roots, but it is NOT associated with OI.
• D. Correct. Dentinogenesis imperfecta type I (DI-I) is associated with osteogenesis imperfecta (OI). It presents with blue-grey or opalescent teeth and obliterated pulp chambers/root canals on radiograph. The teeth are brittle and prone to fracture.