*2.2.1 Scales and indices for assessing temporomandibular disorders*

Clinical manifestations of TMDs were analyzed using the instruments of axis II DC/TMJ [45] according to the recommendations of Ohrbach et al. [46]. Axis II includes the evaluation of indicators on several scales:


### *2.2.2 Clinical diagnostics of factors of psychological predisposition of TMJ*

The method of interviewing, within the framework of a descriptive approach, carried out clinical diagnostics of psychological phenomena, the type of patient's attitude to the disease and communicative deviations according to Rogers [51].

#### *2.2.3 Clinical diagnosis of myofascial and tendon-muscular trigger points*

Identification and qualitative characteristics of trigger points in the muscles and tendon-muscle attachments: m. temporalis; m. masseter; m. pterygoideus lat.; m. geniohyoideus; m. sternocleidomastoideus were carried out according to the criteria established by Simons and Travell [52]. Two indicators were considered: the severity of the local convulsive response (biological response) and the reproducibility of pain in response to palpation of the muscle mass and/or tendon-muscle attachment. The response of the trigger point to the action of the stimulus was assessed in points according to Klineberg and Jagger [53].

Visualization of TMJ elements Cone beam computed tomography and magnetic resonance imaging Analysis of received images Craniometry of tomograms of the temporomandibular joint using an individual anatomical landmark of TMJ structures [54]

Statistical processing of the obtained data was performed using the IBM SPSS 21 package and included comparisons of related groups by the Friedman analysis and the paired Wilcoxon test; independent groups by the Mann–Whitney– Wilcoxon test, qualitative signs—analysis of contingency tables by Pearson's chi-square test.
