To explore the impact of acceleration load on the temporomandibularjoint in aviators and its clinical significance.617 aviators flying aircraft of different types without previous history of temporomandibularjoint disease were studied. Abnormal manifestations of the temporomandibularjointswere analysed. The incidence of temporomandibular joint symptoms was markedly higher in the fighter plane pilots than that in the transportation planegroup. Load induced by acceleration could be one of the main causative factors of temporomandibularjoint disorder.