Psychopathology and clinical features in an Italian sample of patients with myofascial and temporomandibular joint pain: preliminary data.

OBJECTIVE: Aim of this study was to provide data on the relationships between psychopathological variables and temporomandibular disorders (TMD). Sixty-three TMD patients were investigated using clinical and anamnestical psychiatric informations and psychopathological measures.
METHODS: Three groups of TMD patients were recruited according to the Research Diagnostic Criteria for TMD guidelines: a group of patients presenting myofascial pain alone (RDC/TMD axis I group I), a group with temporomandibular joint (TMJ) pain alone (RDC/TMD axis I group IIIa, IIIb), and a group presenting both myofascial and TMJ pain. Two secondary groups were identified on the basis of the presence/absence of myofascial pain. The study design provided a psychiatric interview and psychometric assessment including the Symptom Check List-90-Revised (SCL-90-R), the Hamilton Depression Rating Scale (HDRS), and the Hamilton Anxiety Rating Scale (HARS).
RESULTS: --Psychiatric evaluation: Myofascial pain patients had higher scores for personal psychiatric history and a history of more frequent psychotropic drug use. --HDRS and HARS: The sample presented scores indicating mild depressive symptoms and moderate anxiety symptoms. --SCL-90-R: The global sample showed acute levels of psychological distress as measured by the GSI score (Global Severity Index). Myofascial pain patients scored higher than TMJ pain patients in the GSI (p = .028), PAR (paranoia; p = .015), PSY (psychoticism; p = .032), and HOS (hostility; p = .034) subscales.
CONCLUSIONS: TMD patients showed elevated levels of depression, somatization, and anxiety. These characteristics did not differ significantly between patients with myofascial or TMJ pain. Other specific psychopathological dimensions, detected with SCL-90-R, appeared to be closely associated to the myofascial component.