Aim:
Assessment of relationship between the psychological status of orthodontic patients and the type of malocclusion using the Eysenck Personality Questionnaire.

Material and methods:
Interviews were conducted using the Eysenck test. After the survey, the results of the questionnaire were analyzed according to the openness scale and 206 people aged 12 to 38 years were included in the further study. All patients were divided into groups according to the classification of malocclusion according to Angle - I, II and III class.

Results:
During the verification of the first hypothesis regarding the relationship between patients with malocclusion and the level of neuroticism, a relationship was established in patients with II class (χ2=8.87, p=0.064). When establishing a relationship between patients with different classes of malocclusion and personality traits, no correlations were found (χ2=1.72, p=0.787). According to the results of the Pearson's Chi-square analysis, a relationship was established between patients with different classes of malocclusion and types of temperament (χ2=32.0 p=0.004).

Conclusions:
According to the results of our research, patients with pathology of III class according to Angle most often have the temperament type of sanguine and melancholic with introverted personality traits, with II class - melancholic and choleric, with I class according to Angle - sanguine and choleric, who are characterized by extraversion traits. According to the psychosocial status, patients with pathology of I and II class correspond to a high level of neuroticism, with III class - to an average level of neuroticism.