Symptoms and signs of temporomandibular disorders (TMD) in 46
patients were investigated and compared with those in 20
healthy individuals. Twenty-three patients had fibromyalgia
(FM) and 23 had local myalgia (LM). Facial pain was assessed
with a visual analogue scale, and a clinical examination was
performed, including maximum voluntary mouth opening,
temporomandibular joint sounds, tenderness to digital
palpation in the masticatory muscles, pressure pain threshold
and tolerance level of the superficial masseter muscle,
intramuscular temperature, and maximum voluntary bite force.
There was a difference in the number of tender muscles between
the groups. Pressure pain threshold and tolerance levels were
lower in the FM than in the LM group, whereas both showed
lower values than a control group (C). The intramuscular
temperature and maximum voluntary mouth opening were lower in
the patient groups than in the C group. TMJ sounds showed a
difference between all three groups.
In conclusion, this study shows that FM patients frequently have
TMD and indicates several differences between patients with
FM and LM with regard to clinical variables.