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- Title
Symptoms and Physiological Responses to Prolonged, Repeated, Low-Level Tooth Clenching in Humans.
- Authors
Takeuchi, Tamiyo; Arima, Taro; Ernberg, Malin; Yamaguchi, Taihiko; Ohata, Noboru; Svensson, Peter
- Abstract
Background The traditional view contends bruxism, such as tooth grinding/clenching, is part of the etiology of temporomandibular disorders ( TMD) including some subtypes of headaches. The purpose of this study is to investigate if a low-level but long-lasting tooth-clenching task initiates TMD symptoms/signs. Methods Eighteen healthy participants (mean age ± SD, 24.0 ± 4.3 years) performed and repeated an experimental 2-hour tooth-clenching task at 10% maximal voluntary occlusal bite force at incisors (11.1 ± 4.6 N) for three consecutive days ( Days 1-3). Pain and cardiovascular parameters were estimated during the experiment. Results The task evoked pain in the masseter/temporalis muscles and temporomandibular joint after 40.0 ± 18.0 minutes with a peak intensity of 1.6 ± 0.4 on 0-10 numerical rating scale ( NRS) after 105.0 ± 5.0 minutes ( Day 1). On Day 2 and Day 3, pain had disappeared but the tasks, again, evoked pain with similar intensities. The onset and peak levels of pain were not different between the experimental days ( P = .977). However, the area under the curve of pain NRS in the masseter on Day 2 and Day 3 were smaller than that on Day 1 ( P = .006). Cardiovascular parameters changed during the task but not during the days. Conclusions Prolonged, low-level tooth clenching evoked short-lived pain like TMD. This intervention study proposes that tooth clenching alone is insufficient to initiate longer lasting and self-perpetuating symptoms of TMD, which may require other risk factors.
- Subjects
DENMARK; ANALYSIS of variance; BRUXISM; MATHEMATICAL statistics; MULTIVARIATE analysis; PAIRED comparisons (Mathematics); RESEARCH funding; STATISTICS; TEMPOROMANDIBULAR disorders; VIDEO recording; DATA analysis; PARAMETERS (Statistics); REPEATED measures design; DESCRIPTIVE statistics; DISEASE complications; SYMPTOMS
- Publication
Headache: The Journal of Head & Face Pain, 2015, Vol 55, Issue 3, p381
- ISSN
0017-8748
- Publication type
Article
- DOI
10.1111/head.12528