The objective of the study was to evaluate the relationship between self-reported bruxism and torus mandibularis in patients with temporomandibular disorders (TMD). The subjects of the study were 375 patients diagnosed with TMD and 433 control patients at Chosun University Dental Hospital from November 1, 2017 to June 30, 2018. Self-reported bruxism and torus mandibularis in each group were investigated and compared statistically. Female in sex distribution and prevalence of self-reported bruxism and torus mandibularis was more common in TMD group than in control group (p<0.05). Bruxism and torus mandibularis might be useful as indicators of increased risk of TMD.

The goal of this study was to investigate the causative factors related to the stress of temporomandibular disorders (TMDs) by evaluating salivary cortisol concentration in young adult TMD patients and control groups.Methods: Methods: Saliva was obtained from 32 young adult TMDs patients and 34 control patients without a history of TMDs who visited Chosun University Dental Hospital between June 1 and August 31, 2021. Enzyme-linked immunosorbent assay was conducted to measure the salivary cortisol concentration. Results: Results:The salivary cortisol concentration in the TMD patient group and the control group differed significant significantly (p<0.05). The salivary cortisol concentration according to the duration of the clinical symptom of TMD differed significantly difference between the two groups in the male. The salivary cortisol concentration according to perceived stress level differed significantly in the mild and moderate groups (p<0.05). There was no significant difference in salivary cortisol concentration between the two groups related to bruxism or clenching (p>0.05). Conclusions: Conclusions:The salivary cortisol concentration in the TMD patient group and the control group showed statistical relevance, indicating that stress was a causative factor.