Objective: The objective of this study was to compare psychological conditions and signs and symptoms of TMD in patients with and without mandibular deviations.

Patients and Methods: The patients comprised 99 patients with TMD, and the patients were divided into 2 groups: 26 patients with mandibular deviation and 73 patients without mandibular deviation. The symptoms of TMD were evaluated according to the Craniomandibular Index (CMI). Psychological conditions of patients were assessed by the Beck Depression Inventory (BDI), the Hospital Anxiety Depression Scales (HADS) and the Hamilton Anxiety Rating Scale (HAMA).

Results: There was a statistically significant difference in Craniomandibular Index, the Dysfunction Index, Mandibular Movement, TMJ noise, extra-oral palpation of jaw muscles and TMJ palpation scores between both groups. There was no statistical difference in anxiety and depression scores between the groups with and without mandibular deviation.

Conclusions: Within the limitations of this study it can be concluded that there was an important association between TMD and mandibular deviation, and patients with mandibular deviations showed signs and/or symptoms (limits in range of motion, pain during mandibular movement, TMJ noise during movement, tenderness during extra-oral palpation of jaw muscles and TMJ palpation) of the temporomandibular disorders when compared with patients without mandibular deviations, and there was no an association between psychological conditions of the patients with mandibular deviation.