Post-traumatic trigeminal neuropathic pain after a dental tx

This patient had been suffering from pain in tooth #12, the upper left first pre-molar after a procedure for a porcelain crown. The endodontist ruled out an odontogenic pain and I diagnosed her with PTNP, which stands for post-traumatic trigeminal neuropathic pain. This was treated with a topical compound containing capsaicin, which is the active ingredient in chili pepper.

Source: Youtube