側頭筋部，こう筋部における圧痛しきい値の評価に関する検討

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  • An Evaluation of the Pressure Pain Threshold in the Temporal and Masseter Muscle Regions.

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To find a more reliable method of measuring the pressure pain threshold (PPT), this study focused on those determinant factors that directly affected it's results and its range of fluctuation. PPTs were measured in normal male adults by a newly developed pressure pain measuring system which enabled one to regulate the pressure rate. Results showed the PPTs in the anterior and lower points of the masseter region to be significantly (p<0.01) lower than those of the center, upper and posterior points at a distance of 1cm among the 26 subjects. PPT also increased significantly (p<0.05) in relation to an increase in bite force among the 15 subjects.<BR>Although the actual PPTs were diversified within a wide range of 1, 558 to 3, 699 gf in the temporal region, and between 918 and 3, 155 gf in the masseter region, their relative values, which were calculated as left to right ratio, were within the range of 91.7 to 115.0% in the temporal region, and 71.0 to 111.0% in the masseter region during the 4 consecutive days of measurement among the 10 subjects.<BR>These results imply that the relative PPT values, under the conditions of steady pressure rate during the jaw rest position, could be of value for evaluating changes in muscle pain. Furthermore, it is important to ascertain that the point of applied pressure is done correctly.

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