Bakke M, Michler L, Möller E
Department of Oral Function and Physiology, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark.
Scand J Dent Res. 1992 Oct;100(5):284-91. doi: 10.1111/j.1600-0722.1992.tb01072.x.
Occlusal stability and mandibular elevator muscle function was studied in 25 women (20-30 yr of age). They had 27-32 fully erupted teeth with few treated occlusal surfaces, and craniomandibular function including mandibular mobility was normal. The aim was to analyze the influence of natural patterns of occlusal contact on electromyographic activity, unaffected by pain and functional disorders. Occlusal stability was assessed in the intercuspal and in lateral contact positions as the number of teeth with physical contact and the number of opposing pairs of teeth in contact. Electromyographic activity was recorded by surface electrodes over anterior and posterior temporalis and masseter muscles. In general, positive correlations were found between occlusal stability in intercuspal position and moderate to strong static and dynamic contractions, most significant in masseter muscles, indicating that forceful contraction of these muscles implies stable occlusion. Systematically, the duration of activity during chewing was negatively correlated with occlusal stability in the intercuspal position, most pronounced in working-side muscles. This pointed to shorter contractions with stable occlusion and is interpreted as the result of less need for stabilizing activity. It is concluded, that the correlations between occlusal stability and elevator muscle function are probably based on feedback mechanisms from periodontal pressoreceptors.
对25名年龄在20至30岁之间的女性进行了咬合稳定性和下颌升肌功能的研究。她们有27至32颗完全萌出的牙齿，经过治疗的咬合面较少，并且包括下颌运动在内的颅下颌功能正常。目的是分析不受疼痛和功能紊乱影响的自然咬合接触模式对肌电图活动的影响。在牙尖交错位和侧方接触位评估咬合稳定性，以有物理接触的牙齿数量和相互接触的牙对数量来衡量。通过表面电极记录颞肌前、后部和咬肌的肌电图活动。总体而言，牙尖交错位的咬合稳定性与中度至强烈的静态和动态收缩之间存在正相关，在咬肌中最为显著，这表明这些肌肉的强力收缩意味着稳定的咬合。系统地观察发现，咀嚼过程中的活动持续时间与牙尖交错位的咬合稳定性呈负相关，在工作侧肌肉中最为明显。这表明咬合稳定时收缩时间较短，被解释为稳定活动需求减少的结果。得出的结论是，咬合稳定性与升肌功能之间的相关性可能基于牙周压力感受器的反馈机制。
