Pulp chamber is absent in:: (A) Dentinogenesis imperfecta, (B) Amelogenesis imperfecta, (C) Craniofacial dysostosis, (D) None of the above
Answer is A. Dentinogenesis imperfecta is an autosomal dominant condition affecting both deciduous and permanent teeth. Affected teeth are gray to yellowish-brown and have broad crowns with constriction of the cervical area resulting in a ‘tulip’ shape. Radiographically, the teeth appear solid, lacking pulp chambers and root canals. Enamel is easily broken leading to exposure of dentin that undergoes accelerated attrition.
Ref: Shafer's textbook of oral pathology 7th edition page 55