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Somatosensory profiles in subgroups of patients with myogenic temporomandibular disorders and fibromyalgia syndrome
Pain, 09/23/09

Pfau DB et al. – Some patients with myofascial pain from temporomandibular disorders (TMD) report pain in extra–trigeminal body regions. The authors' aim was to distinguish TMD as regional musculoskeletal pain syndrome from a widespread pain syndrome based on patients’ tender point scores, pain drawings and quantitative sensory testing (QST) profiles...Sensitive TMD patients did not fulfil diagnostic criteria for FMS in regard to widespread pain as shown by their pain drawings. TMD subgroups did not differ with respect to psychological parameters. The sensitive subgroup was more sensitive compared to healthy controls and to insensitive TMD patients in regard to their QST profile over all test areas as well as to their tenderness over orofacial muscles and trigeminal foramina. However, sensitive TMD patients had a short pain duration arguing against a transition from TMD to FMS over time. Data rather suggest an overlap in pathophysiology with FMS, e.g. a disturbance of central pain processing, in this subgroup of TMD patients. Those patients could be identified on the basis of their tender point count as an easy practicable screening tool.

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