[Orofacial pain and secondary headaches].

Recent studies have improved our knowledge of the mechanisms underlying orofacial pain. This review presents the most relevant aspects of such mechanisms according to the different clinical features of the various entities in orofacial pain: odontogenic pain, atypical facial pain and other idiopathic orofacial pain conditions and musculoskeletal pain characterized by pain in the temporomandibular joint and/or the associated muscles of mastication. The link between the muscular temporomandibular disorders and tension type headache is particularly considered in the light of the different possible mechanisms.