Department of Partial and Complete Denture, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan.
Department of Partial and Complete Denture, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan.
J Prosthodont Res. 2017 Oct;61(4):426-431. doi: 10.1016/j.jpor.2017.01.002. Epub 2017 Feb 22.
The purpose of this study was to clarify the effect of the bitterness of food on muscular activity and masticatory movement.
Twenty healthy subjects were asked to chew a non-bitter gummy jelly and a bitter gummy jelly on their habitual chewing side. The masseter muscular activity and the movement of mandibular incisal point were recorded simultaneously. For all cycles excluding the first cycle, parameters representing the muscular activity (total integral value and integral value per cycle) and masticatory movement (path, rhythm, and stability) were calculated and compared between the two types of gummy jellies.
The total integral value of masseter muscular activity during the chewing of bitter gummy jelly was significantly smaller than during the chewing of non-bitter gummy jelly, however, no definite trends in the integral value per cycle and the stability of movement were observed. The parameters representing the movement path tended to be small during the chewing of bitter gummy jelly than during the chewing of non-bitter gummy jelly. The masticatory width was significantly smaller during the chewing of bitter gummy jelly. The parameters representing the rhythm of movement were significantly longer during the chewing of bitter gummy jelly than during the chewing of non-bitter gummy jelly.
From these results it was suggested that the bitterness of food does not affect the integral value per cycle or the stability of the masticatory movement, but it does affect the movement path and rhythm, with narrowing of the path and slowing of the rhythm.
本研究旨在阐明食物苦味对肌肉活动和咀嚼运动的影响。
本研究邀请 20 名健康受试者，用惯用侧咀嚼非苦味胶姆糖和苦味胶姆糖，同时记录咀嚼肌的肌电活动和下颌切牙的运动轨迹。对除首例外的所有咀嚼周期，计算并比较两种胶姆糖的咀嚼肌活动（总积分值和周期积分值）和咀嚼运动（轨迹、节律和稳定性）的参数。
咀嚼苦味胶姆糖时，咀嚼肌总积分值明显小于咀嚼非苦味胶姆糖，但咀嚼周期积分值和运动稳定性无明显趋势。咀嚼苦味胶姆糖时，运动轨迹参数较小。咀嚼苦味胶姆糖时，咀嚼宽度明显较小。咀嚼苦味胶姆糖时，运动节律的参数明显较长。
这些结果表明，食物的苦味并不影响咀嚼运动的周期积分值或稳定性，但会影响运动轨迹和节律，使轨迹变窄，节律变慢。
