External Resorption 

External cervical resorption is caused, almost exclusively, by dental trauma, especially concussion, and it is a dental disease to be accurately diagnosed and treated by an endodontist, although the vast majority of the cases is at first diagnosed by an orthodontist.

Commonly, the cause of external cervical resorption is mistakenly attributed as if it were induced by orthodontic treatment, by traumatic occlusion or even chronic inflammatory periodontal disease. External cervical resorption is associated to dental trauma in many situations listed in this paper.