Final answer:
Dentinogenesis imperfecta causes an abnormal appearance on X-rays, characterized by a lack of contrast between dentin and enamel, obliterated pulp chambers, and possibly short, blunt tooth roots.
Step-by-step explanation:
Dentinogenesis imperfecta is a genetic disorder that affects tooth development, leading to discolored, weak, or misshaped teeth.
On an X-ray, teeth with dentinogenesis imperfecta tend to exhibit a distinctive appearance where the teeth have a lack of contrast between the dentin and the enamel, this is due to the abnormal density of the dentin. The pulp chambers can be obliterated or completely filled in with dentin, meaning there would be a lack of the usual dark shadow in the center of the tooth that indicates the presence of a normal pulp chamber. In some cases, the tooth roots may also be short and blunt. Radiographs of affected teeth may also show thin enamel which is prone to damage and wear.