Definition: Genetic disturbances in enamel formation leading to altered morphology of enamel. There is normal dentin and pulp formation. The teeth will appear yellowish brown. There are four general types (hypoplastic, hypocalcified, hypomaturation, and hypomaturation-hypocalcified with taurodontism). Below I’ve described general findings of amelogenesis imperfecta and not for one specific type.
Shape: Thin (or completely absent) to normal thickness of enamel. Crowns tend to have a ‘square’ shape with multiple open contacts present.
Internal: If enamel is present, it is radiopaque but is the radiopacity of dentin (which is less than normal forming enamel).
Number: Associated with all teeth in the oral cavity.
(click image to enlarge)
(note the square shape and thin enamel present)
(note the square crowns with multiple open contacts)