Introduction:

There is a prevalence of temporomandibular joint dysfunction which is related to personality disorders, due to the moods experienced by these patients.

Objective:

Determine the comorbidity of personality disorders and temporomandibular joint dysfunction.

Methods:

A cross-sectional observational descriptive study was conducted at the Orthodontics service during one year, from February 2017 to 2018. The study universe was 250 patients, of whom a sample of 64 was selected by simple random sampling on the basis of inclusion criteria. The presence of temporomandibular dysfunction was determined by Maglione and collaborators' dysfunction index.

Results:

Temporomandibular joint dysfunction was found in 57 patients, of whom 46.87 % had dysfunction class II (moderate), and 89.06% had some sort of personality disorder, such as histrionic (25.00 %) or obsessive-compulsive personality (26.56 %).

Conclusions:

In most of the patients examined a relationship was found between personality disorders and temporomandibular joint dysfunction, showing that there is comorbidity between the two conditions.

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