Is the resorption external or internal?

UNLABELLED: Resorption of teeth is reviewed from a diagnostic perspective to clarify the confusion as to whether it is external or internal. The key features of the various types (external surface, transient apical breakdown, external inflammatory, external replacement, external cervical and internal) are described and illustrated by cases. Management and appropriate treatment is dependent on the correct diagnosis. CLINICAL RELEVANCE: Diagnosis of resorption is essential to the appropriate management.