[Chronic mandibular dislocation]

Various forms of malocclusion which deepens upon unilateral or bilateral mandibular dislocation are discussed. The emphasis is on diagnostic problems in dislocation produced in an unconscious patient, during the general anesthesia, epileptic fit, following tooth extraction or in edentulous patient. Author's own 3 patients with mandibular dislocation lasting between 2 weeks and 2.5 years are presented. In these cases etiological factor of malocclusion was erroneously diagnosed as Bell's disease or drug-induced extrapyramidal dyskinesis.