Development of temporomandibular disorder symptoms: a 3-year cohort study of university students

Abstract

The aims of this study were to examine the incidence of temporomandibular disorders (TMDs) over a 3-year period and to evaluate the risk of self-reported TMDs among university students in Japan. The study population comprised 2374 university students examined at the start of their undergraduate course and 492 students re-examined after 3 years using questionnaires on symptoms of TMD and experiences of jaw injury, stress, orthodontic treatment and parafunctional habits. Cumulative incidence (%) and relative risks were calculated overall. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to determine the degree of risks of these variables for symptoms of TMDs using logistic regression. Results of logistic regression analysis showed that male subjects with experience of jaw injury had a 3·54 (CI=1·45-8·68, P<0·01)-fold higher risk of temporomandibular joint (TMJ) pain than that for those who did not. Female subjects who reported experiencing stress and bruxism had 10·56 (CI=1·28-87·54, P<0·05)- and 5·00 (CI=1·21-20·71, P<0·05)-fold higher risks of TMJ sound, respectively, than the risk for female subjects who had not experienced stress or bruxism. The results indicated that experiences of jaw injury, stress and bruxism were significantly associated with increased risks of development of TMJ disorders in a 3-year cohort.

Association of stress and depression with chronic facial pain: A case-control study based on the Northern Finland 1966 Birth Cohort

“…These results support earlier findings showing that psychosocial factors such as depression and stress associate with facial pain. [25][26][27] . Akhter et al 25 discovered in their study from 492 Japanese university students that stress, traumas, and bruxism associate significantly with TMD in a three-year follow-up period.…”

ANKH Polymorphisms and Clicking of the Temporomandibular Joint in Dental Residents

“…The prevalence was higher than that in the general population [1,2]. Since psychological stress was associated with TMJ clicking [13] and junior hospital dentists of the oral surgery specialty sustained larger stress [36], the high percentage of such a manifestation among the first-year dental residents at the Department of Oral and Maxillofacial Surgery is anticipatable.…”

“…Epidemiological papers have demonstrated a relationship between occurrence of TMJ clicking and psychological stress [13], impaired masticatory functions [2], parafunctions [13,14] as well as dental caries [14]. A cephalometric study has found a shorter sagittal midface amongst those patients who displayed the joint sound [15].…”

Orofacial pain and temporomandibular disorders: the impact on oral health and quality of life

“…dental occlusion and bruxism), 10,11 psychological factors, like stress 11 and depression, 12 have also been related to TMD, especially chronic TMD conditions. It is well-reported that a considerable number of TMD patients are clinically depressed, and this depression may influence their response to conventional therapies.…”