The identification of characteristic features of patients who complain mainly of maxillary or mandibular protrusion could provide useful information for orthodontic treatment.
We analyzed 14 female patients with maxillary protrusion and 22 female patients with mandibular protrusion using the MINI psychological analysis system.
Z tests were conducted in order to examine the deviation of each score from the standard score of the MINI system. In the case of maxillary protrusion, the scores for D (depression), Pt (psychasthenia), and Si (social introversion) were significantly lower than standard. Mandibular protrusion female patients scored significantly higher than standard for Hy (hysteria), and Pa (paranoia).
The X 2 test was used to examine the deviation of dispersion values from the standard dispersion values of MINI. In the case of maxillary protrusion, no significant deviation from standard was observed. Mandibular protrusion patients showed significant deviation for Hs (hypochondriasis), Hy (hysteria), and Pa (paranoia).
These results suggest that, by comparison with the MINI standards, female patients with maxillary protrusion are apt to be optimistic and extrovert, showing fewer signs of anxiety and tension. They have lower levels of stress and tend to be sociable. Female patients with mandibular protrusion seem more liable to somatoform disorders (hypochondriasis and conversion disorders), tend to be hypersensitive and suspicious, and also display a variety of somatoform disorders (hypochondriasis, conversion, and somatization disorders) and hypersensitivity.
