Prevalence of etiologic factors in temporomandibular disorder in 100 patients examined in Mashhad Dental School

Some factors can affect T.M.J. In this survey, prevalence of etiologic factors such as trauma, dental premature contacts, parafunctional habits and psychologic factors was studied. Methods & Materials: 100 patients who had T.M.D and referred to Mashhad Dental School was examined. For each patient a questionnaire was provided and etiologic factors evaluated. The most of patients were affected by pscychologic factors (77%). The next lateral eccentric premature contacts were higher than others (71%). Followed by clenching (38%), Bruxism (21%) and Trauma to T.M.J or chin (19%). The most important etiologic factor of TMD was psychologic followed by lateral eccentric premature contacts.