Zhang G, Huang X, Herring S W
Department of Orthodontics, University of Washington, Seattle 98195.
J Oral Rehabil. 1994 Sep;21(5):613-22. doi: 10.1111/j.1365-2842.1994.tb01176.x.
Unilateral premature occlusal contacts are known to alter masticatory activity levels during clenching, but whether natural chewing is similarly affected is not known. The purpose of this study was to analyse the effects of a unilateral bite splint on mastication. Eleven experiments were carried out using three miniature pigs. Electromyography of the masticatory muscles and movements of the jaw were recorded during natural chewing before and after inserting a bite splint on the second and third deciduous premolars. In contrast to human clenching, the integrated activities of the jaw-closing muscles increased, especially on the contralateral side. The increases were mainly due to the prolongation of the burst durations. Jaw opening activity was increased as well. The frequency of mastication fell slightly and the animal preferred to chew food on the bite splint side. These results demonstrate the importance within the particular experimental conditions of the occlusal condition in regulating chewing behaviour.
已知单侧过早的咬合接触会改变紧咬时的咀嚼活动水平，但自然咀嚼是否同样受到影响尚不清楚。本研究的目的是分析单侧咬合板对咀嚼的影响。使用三只小型猪进行了十一项实验。在第二和第三乳前磨牙上插入咬合板之前和之后，记录自然咀嚼过程中咀嚼肌的肌电图和下颌运动。与人类紧咬不同，闭口肌的综合活动增加，尤其是对侧。增加主要是由于爆发持续时间的延长。张口活动也增加了。咀嚼频率略有下降，动物更喜欢在咬合板一侧咀嚼食物。这些结果证明了在特定实验条件下咬合状况在调节咀嚼行为中的重要性。
