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  • Title: Immediate effects of the serotonin antagonist granisetron on temporomandibular joint pain in patients with systemic inflammatory disorders.
    Author: Voog O, Alstergren P, Leibur E, Kallikorm R, Kopp S.
    Journal: Life Sci; 2000 Dec 22; 68(5):591-602. PubMed ID: 11197756.
    Abstract:
    The aim of this study was to investigate if the 5-HT3 antagonist granisetron reduces temporomandibular joint (TMJ) pain in patients with systemic inflammatory joint disorders. Sixteen patients with systemic inflammatory joint disease with pain localized over the TMJ region and tenderness to digital palpation of the TMJ were included. The current resting pain (VASRest) and the pain during maximum mouth opening (VAS(MVM)) of the TMJs were assessed with a 100 mm visual analogue scale. An electronic pressure algometer was used to estimate the pressure pain threshold (PPT) over the lateral aspect of the TMJ. Venous blood was collected for measurement of the plasma and serum levels of 5-HT, erythrocyte sedimentation rate, rheumatoid factor and C-reactive protein. The selective 5-HT3 receptor antagonist granisetron or saline were injected into the posterior part of the upper TMJ compartment in a randomized double-blind manner. The patients in the granisetron group had lower VASRest than the patients in the saline group after 10 min. In the granisetron group, VASRest was decreased after 10 min, while VAS(MVM) was decreased and PPT increased after 20 min. In the saline group, VAS(MVM) was decreased after 20 min. In conclusion, granisetron has an immediate, short-lasting and specific pain reducing effect in TMJ inflammatory arthritis. The 5-HT3 receptor may therefore be involved in the mediation of TMJ pain in systemic inflammatory joint disorders.
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