Age >18

Signed informed consent

Patient with health insurance

Patient with untreated orofacial pain or not relieved by over 3 months treatment

Patient fulfilling the criteria of painful post-traumatic trigeminal neuropathy (ICHD-3):

A. Facial and/or oral pain in the distribution(s) of one or both trigeminal nerve(s) and fulfilling criterion C

B. History of an identifiable traumatic event to the trigeminal nerve(s), with clinically evident positive (hyperalgesia, allodynia) and/or negative (hypaesthesia, hypalgesia) signs of trigeminal nerve dysfunction. The traumatic event may be mechanical, chemical, thermal or caused by radiation.

C. Evidence of causation demonstrated by both of the following:

• 1.

  pain is localized to the distribution(s) of the trigeminal nerve(s) affected by the traumatic event

• 2.

  pain has developed <6 months after the traumatic event

D. Not better accounted for by another ICHD-3 diagnosis

Patient with orofacial pain efficiently treated with drugs

Patient refusing to participate in the investigation

Non adult patient

Patient with communication impairment

Patient participating in another investigation

Patient with no health insurance

Patient using a drug that might cause chronic orofacial pain (such as neuroleptics or conversion enzyme inhibitors)