The aim of this work was to present data from a large sample of patients with Temporo-Mandibular Disorders (TMD) in order to clarify some aspects of the development of pathological conditions that affect large parts of the population. In the past years there was a rapid growth of the incidence of the temporomandibular dissorders. The ethiopathogenesis is in most cases unclear. Based on the latest information supposed are the biopsychosocial factors.