Definition: Elongated body and pulp chamber of a multi-rooted tooth with shorter than normal roots. The crown appears to be within the range of normal.
Location: Most commonly seen on mandibular molars, but can be associated with any multi-rooted tooth.
Shape: Elongated body of a tooth with shortened roots.
Internal: Radiopaque, same radiopacity as tooth structure.
Number: Can be either single or multiple.
(note the enlongated body and pulp chamber of the second molar – #18)