X-ray findings showing teeth with no pulp chamber are indicative of which condition?

The condition characterized by X-ray findings showing teeth with no pulp chamber is dentinogenesis imperfecta. This genetic disorder affects the formation of dentin, one of the main components of teeth, leading to various dental abnormalities. The lack of a visible pulp chamber in X-rays can be attributed to the defective dentin, which is usually of a reduced volume or density compared to normal dentin. This deficiency can result in the teeth appearing translucent or discolored and can also lead to increased fragility, making them more prone to fractures.

In contrast, Paget's disease primarily affects the bones, causing them to become enlarged and misshapen, but it does not specifically result in the absence of the pulp chamber in teeth. Aphthous ulcers are painful lesions that occur in the soft tissues of the mouth and do not involve changes to teeth or their internal structures. Fibrous dysplasia affects bone structure but is not directly related to the pulp chambers of teeth. Therefore, dentinogenesis imperfecta is the most appropriate condition to associate with X-ray findings of teeth lacking pulp chambers.