Manns A, Miralles R, Cumsille F
J Prosthet Dent. 1985 Feb;53(2):243-7. doi: 10.1016/0022-3913(85)90120-9.
Occlusal splints were adjusted to different vertical heights and used to single out the influence of vertical dimension of occlusion in increments on BT-EMG activity of the masseter muscle in patients with mandibular dysfunction. The vertical dimension of least EMG activity was determined for each of 60 patients, who were randomly divided into three groups according to the vertical dimension at which the occlusal splint was adjusted: group No. 1, 1 mm from occlusal vertical dimension; group No. 2, mean vertical dimension, 4.25 mm; group No. 3, mean vertical dimension, 8.25 mm. Results showed a significant reduction of masseter BT-EMG activity (series A and B) at the end of the 3-week treatment period for patients in group Nos. 2 and 3 in comparison with group No. 1. Furthermore, the short-term use of occlusal splints with a vertical height that exceeded the so-called physiologic interocclusal distance did not result in an increase in masseter BT-EMG activity. This study suggests that an increase of vertical dimension of occlusion to or near the vertical dimension of least EMG activity by means of occlusal splints can be an effective way to obtain a reduction in masseteric muscle activity.
将咬合板调整到不同的垂直高度，以区分咬合垂直距离增量对下颌功能障碍患者咬肌肌电活动的影响。确定了60例患者各自肌电活动最少时的垂直距离，并根据咬合板调整的垂直距离将他们随机分为三组：第1组，比咬合垂直距离低1mm；第2组，平均垂直距离，4.25mm；第3组，平均垂直距离，8.25mm。结果显示，与第1组相比，第2组和第3组患者在3周治疗期结束时咬肌肌电活动（A组和B组）显著降低。此外，短期使用垂直高度超过所谓生理牙合间距离的咬合板并不会导致咬肌肌电活动增加。本研究表明，通过咬合板将咬合垂直距离增加到肌电活动最少时的垂直距离或接近该距离，可能是降低咬肌活动的有效方法。
