Journal of oral rehabilitation
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Randomized Controlled Trial
Effect of hypnosis on oral function and psychological factors in temporomandibular disorders patients.
This study investigated the effect of hypnosis in patients with temporomandibular disorders (TMD) with focus on oral function and psychological outcomes. Forty women (mean age +/- s.d.: 38.6 +/- 10.8 years) suffering from TMD (mean duration 11.9 +/- 9.9 years) were randomized to four individual 1-hour sessions of either hypnotic intervention or a control condition of simple relaxation. Pain intensity was assessed three times daily on a 0-10 Numerical Rating Scale. ⋯ The hypnosis group also increased use of the coping strategy 'reinterpreting pain sensations' from 5.2 +/- 6.9 to 10.3 +/- 6.8 (P < 0.001). Both groups exhibited significant reductions in the number of painful muscle palpation sites and pain on palpation (P < 0.004), in number of awakenings due to pain (P < 0.006), and in somatization, obsessive compulsive symptoms and anxiety (P < 0.004). Hypnosis thus appears to effectively reduce some aspects of complex TMD pain.