[The concept of the pathogenesis of occlusive disorders in diseases of the temporomandibular joint].

Abnormal occlusion developing in adult patients is always caused by involvement of the temporomandibular joints. Destructive diseases of an infectious origin are characterized by unilateral involvement of the joints, unilateral reduction of the interocclusal height, and increased abrasion of teeth due to increased masticatory loading. Occlusive contact is preserved in all teeth. The second group of destructive diseases of the temporomandibular joint includes rheumatoid arthritis and systemic scleroderma and is characterized by symmetrical involvement, polyarthritis, and rapid progress. Clinically frontal occlusion develops, which is caused by deformation of articular processes, mandibular body, angle, and branch.