A girl presents with tooth discoloration and enamel erosion without cavities. An OPG reveals pulp chamber obliteration, narrowed canals, and secondary dentin deposition. She reports that 2 of her 4 brothers have the same condition. What is the most likely diagnosis?

Explanation

The clinical and radiographic findings, along with family history, suggest dental fluorosis, which causes enamel discoloration and changes without cavity formation. The pulp chamber is often obliterated due to secondary dentin deposition. Other conditions like amelogenesis imperfecta and dentinogenesis imperfecta have different clinical presentations.