Background: Although a correlation between anxiety states, stress, and the occurrence of periodontal disorders has been reported, more research on other psychological symptoms seems to be necessary. Objectives: To evaluate the association between psychological disorders and periodontitis. Patients and Methods: In a case-control study, 40 patients with chronic periodontitis and 40 healthy individuals, all between 20 to 40 years old and able to read and write, participated. Clinical examinations were performed by a single examiner. Psychological assessment was done using the SCL-90-R questionnaire.
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