Tasaka Akinori, Kikuchi Manaki, Nakanishi Kousuke, Ueda Takayuki, Yamashita Shuichiro, Sakurai Kaoru
Department of Removable Partial Prosthodontics, Tokyo Dental College, Tokyo, Japan.
Department of Removable Prosthodontics and Gerodontology, Tokyo Dental College, Tokyo, Japan.
J Prosthodont Res. 2018 Jan;62(1):50-55. doi: 10.1016/j.jpor.2017.05.003. Epub 2017 Jul 1.
The objective of the present study was to investigate the relationship between masticatory function-related factors (masticatory performance, occlusal contact area, maximum bite force, number of chewing strokes, and muscle activity) and the stress-relieving effects of chewing.
A total of 28 healthy male subjects were instructed to rest or chew for 10min after 30min of stress loading with arithmetic calculations. Their stress state was assessed by measuring salivary cortisol levels. Saliva was collected at three time points: before stress loading, immediately after stress loading, and 10min after stress loading. Compared to resting, chewing produced a significantly greater reduction in the rate of change in salivary cortisol levels 10min after stress loading.
A negative correlation was observed between the rate of decrease in salivary cortisol levels and the number of chewing strokes. No significant correlation was observed between the rate of decrease in salivary cortisol levels and other measurement items.
In healthy dentulous people, the number of chewing strokes has been shown to be a masticatory function-related factor that affects stress relief from chewing, suggesting the possibility that more appropriate chewing would produce a greater effect psychological stress relief.
本研究的目的是调查咀嚼功能相关因素（咀嚼性能、咬合接触面积、最大咬合力、咀嚼次数和肌肉活动）与咀嚼的减压效果之间的关系。
共有28名健康男性受试者在进行30分钟算术计算的应激负荷后，被要求休息或咀嚼10分钟。通过测量唾液皮质醇水平来评估他们的应激状态。在三个时间点收集唾液：应激负荷前、应激负荷后立即以及应激负荷后10分钟。与休息相比，咀嚼在应激负荷后10分钟时唾液皮质醇水平的变化率降低更为显著。
观察到唾液皮质醇水平下降率与咀嚼次数之间呈负相关。唾液皮质醇水平下降率与其他测量项目之间未观察到显著相关性。
在健康有牙人群中，咀嚼次数已被证明是影响咀嚼减压的咀嚼功能相关因素，这表明更适当的咀嚼可能会产生更大的心理减压效果。
