期刊
JOURNAL OF ORAL & FACIAL PAIN AND HEADACHE
卷 28, 期 3, 页码 191-204出版社
QUINTESSENCE PUBLISHING CO INC
DOI: 10.11607/ofph.1211
关键词
jaw movement; orofacial pain; Pain Adaptation Model; pain catastrophizing; pain intensity
资金
- National Health and Medical Research Council of Australia [512309]
- Australian Dental Research Foundation, Inc.
- University of Sydney
Aims: To investigate differences between higher and lower pain catastrophizers in the effects of hypertonic saline evoked jaw muscle pain on pain perception and jaw movement. Methods: Repetitive open/close jaw movements were recorded in 28 asymptomatic participants (20 men, 8 women; ages 25 to 62 years) during continuous infusion of 5% hypertonic saline or isotonic saline into the right masseter muscle. All participants completed the McGill Pain Questionnaire; the Depression, Anxiety and Stress Scales; and the Jaw Function Limitation Scale. They were divided into two groups depending or the median Pain Catastrophizing Scale score. Statistical analyses involved multivariate analysis of variance, independent samples or paired t tests, and Pearson correlations (statistical alpha: P < .05). Results: Pain intensity, unpleasantness, perceived area, and pain rating indices were significantly (P < .05) elevated in higher pain catastrophizers during hypertonic saline-evoked pain in comparison with lower catastrophizers. The higher catastrophizers exhibited significantly (P < .05) slower jaw velocity than the lower catastrophizers during hypertonic saline infusion in comparison with IS infusion. In comparison with lower catastrophizers, there was a significantly greater change in the percentage of coefficient of variation between hypertonic saline and isotonic saline infusions in higher catastrophizers for closing velocity and opening and closing amplitude. Conclusion: The increased reported pain intensity, pain areas, and pain rating indices are consistent with enhanced central sensitization processes in high-catastrophizing individuals. The slower velocity and greater variability of repetitive jaw movements in higher pain catastrophizing individuals in acute experimental pain may reflectchanges in motor coordination as an example of avoidance behavior for the jaw motor system.
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