Journal of Oral Medicine and Pain

Korean Academy of Orofacial Pain and Oral Medicine (대한안면통증구강내과학회)
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Gender Differences in Pressure Pain Thresholds during Sustained Jaw Muscle Contraction

  • Kim, Cheul (Department of Oral Medicine and Diagnosis, Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University) ;
  • Kim, Ji Rak (Department of Oral Medicine and Oral Diagnosis, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Chung, Jin Woo (Department of Oral Medicine and Oral Diagnosis, School of Dentistry and Dental Research Institute, Seoul National University)
  • Received : 2014.10.02
  • Accepted : 2014.10.22
  • Published : 2014.12.30
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Abstract

Purpose: To determine whether a fatiguing clench significantly affects the changes in pressure pain threshold (PPT) in men compared to women. Methods: The changes of PPTs from before to after a sustained clench in 12 men and 12 women were obtained. We used a decrease in median frequencies of surface electromyography (EMG) power spectra from the start to the end of the sustained clench as evidence of fatigue. Endurance time for the clench was used as a covariate. Results: The median frequencies decreased after the clench in both the anterior temporalis and masseter muscles, did not differ with the muscle or the gender of the subjects, and none of the interaction terms were significant. The PPTs were lower for women for both muscles, were decreased after the sustained clench, but failed to show the hypothesized gender by time interaction. Conclusions: Our results show that women have lower PPTs than men, but do not respond differently than men to jaw muscle fatigue.

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References

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