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Experimental low-level jaw clenching inhibits temporal summation evoked by electrical stimulation in healthy human volunteers

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Title: Experimental low-level jaw clenching inhibits temporal summation evoked by electrical stimulation in healthy human volunteers
Authors: Tada, Hiroaki / Torisu, Tetsurou / Tanaka, Mihoko / Murata, Hiroshi / De Laat, Antoon / Svensson, Peter
Issue Date: May-2015
Publisher: Elsevier Limited
Citation: Archives of Oral Biology, 60(5), pp.681-689; 2015
Abstract: Objective To examine the effect of low-level jaw clenching on temporal summation in healthy volunteers. Design In 18 healthy volunteers, the pain intensities evoked at the masseter muscle and the hand palm by the first and last stimuli in a train of repeated electrical stimuli (0.3 or 2.0 Hz) were rated using 0-100 mm visual analogue scales (VAS), in order to evaluate temporal summation before and after three types of jaw-muscle tasks: low-level jaw clenching, repetitive gum chewing and mandibular rest position. A set of concentric surface electrodes with different diameters (small and large) was used for the electrical stimulation. Results The temporal summation evoked by the large diameter electrode with 2.0 Hz stimulation decreased significantly both on the masseter and the hand after low-level clenching (P > 0.03), but did not show any significant change after the other tasks (P > 0.23). The VAS score of the first stimulation did not show any significant changes after low-level clenching (P > 0.57). Conclusions Experimental low-level jaw clenching can inhibit pain sensitivity, especially temporal summation. Low-level jaw clenching can modify pain sensitivity, most likely through the central nervous system. The findings suggest that potential harmful low-level jaw clenching or tooth contacting could continue despite painful symptoms, e.g., temporomandibular disorders.
Keywords: Concentric electrode / Masticatory muscles / Pain sensitivity / Stimulation depth / Temporal summation / Temporomandibular disorders
URI: http://hdl.handle.net/10069/35266
ISSN: 00039969
DOI: 10.1016/j.archoralbio.2015.02.013
Rights: © 2015 Elsevier Ltd. / NOTICE: this is the author’s version of a work that was accepted for publication in Archives of Oral Biology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Archives of Oral Biology, 60, 5, (2015)
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/35266

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