Ingervall B
Angle Orthod. 1976 Oct;46(4):372-80. doi: 10.1043/0003-3219(1976)046<0372:FMAAOT>2.0.CO;2.
The correlations between facial and bite morphology and the activity in the temporal muscle and in the musculature of the lip during swallowing and chewing were studied in 50 girls, aged 9-13 years. The activity was recorded electromyographically by determining the maximal mean voltage amplitude and morphologically by analysis of profile roentgenograms and dental casts. The activity in the lower lip during the swallowing was not correlated with any of the variables of the facial morphology with the exception of the width of the upper dental arch. On the other hand, the activity of the upper lip during swallowing, as in the anterior and posterior portions of the temporal muscle, was correlated with a number of variables used for measuring facial form. The activity was low in girls with a facial shape with anterior inclination of the maxilla and mandible, small face height, and pronounced prognathism. The activity in the upper lip during chewing varied, as in the lower lip, independently of facial form, while the activity of the temporal muscle during chewing showed the same relation to facial form as during swallowing. The number of chewing cycles required for trituration of the test media (apples and peanuts) was negatively correlated with the number of teeth and with age. This was interpreted as adaptation in such a way that the number of cycles decreased with development of the dentition.
对50名9至13岁女孩吞咽和咀嚼过程中面部及咬合形态与颞肌和唇部肌肉活动之间的相关性进行了研究。通过测定最大平均电压幅度以肌电图方式记录活动，并通过分析侧面X线片和牙模进行形态学记录。吞咽时下唇的活动除了与上牙弓宽度外，与面部形态的任何变量均无相关性。另一方面，吞咽时上唇的活动，如同颞肌的前部和后部一样，与一些用于测量面部形态的变量相关。上颌和下颌向前倾斜、面高较小且有明显凸颌的面部形状的女孩活动较低。咀嚼时上唇的活动如同下唇一样，与面部形态无关，而咀嚼时颞肌的活动与吞咽时一样，与面部形态呈现相同关系。研磨测试介质（苹果和花生）所需的咀嚼周期数与牙齿数量和年龄呈负相关。这被解释为一种适应性变化，即随着牙列的发育，周期数减少。
