Johnston C P, Throckmorton G S, Bell W H
J Oral Maxillofac Surg. 1984 Oct;42(10):656-64. doi: 10.1016/0278-2391(84)90208-8.
Surgical reduction of lower anterior facial height may alter several aspects of jaw muscle function. This study examined the biomechanics, electromyographic activity, and maximal bite forces in three patients manifesting vertical maxillary excess prior to and six months following superior repositioning of the maxilla. Reduction of lower anterior facial height by Le Fort I osteotomy tends to increase mechanical advantage of the jaw adductor muscles. It may also decrease muscle activity during isometric biting. It does not appear to alter the maximal isometric bite force.
手术降低下面部高度可能会改变颌面部肌肉功能的多个方面。本研究检测了3例垂直性上颌骨过长患者在进行上颌骨上移复位术前及术后6个月时的生物力学、肌电图活动及最大咬合力。通过Le Fort I型截骨术降低下面部高度往往会增加颌内收肌的机械优势。这也可能会减少等长咬合时的肌肉活动。但似乎不会改变最大等长咬合力。
