Schwestka-Polly R, Engelke W, Hoch G
Department of Orthodontics, Georg-August-University, Göttingen, Germany.
Eur J Orthod. 1995 Oct;17(5):411-7. doi: 10.1093/ejo/17.5.411.
In orthodontics dysfunctions of the tongue are discussed as a factor in the development of malocclusion. A new objective method for examining tongue movement is the electromagnetic articulography (EMA). This enables movements of the tongue to be followed using the principle of inductive distance measurements. A helmet made of acrylic material serves as a carrier for three transmitter coils. These are located in front of the forehead, in front of the chin, and at the back of the neck. Receiver coils are fixed to the tip of the tongue and at two points on the dorsum of the tongue. The distance between the receiver and the transmitter coils is calculated by means of a personal computer. The movement trajectories are displayed on a computer screen in x-y-coordinates. Tongue movements of one patient with an anterior open bite are shown during characteristic test sounds and during swallowing. The first examination took place without any orthodontic appliance. In a second series in the same session, tongue movement was recorded under the influence of an orthodontic appliance with spikes. While the patient shows vertical combined with sagittal components in the movement pattern of the tongue without an orthodontic appliance, the same patient, under the influence of an orthodontic appliance with spikes, shows a change of the rest and work position of the tongue and in the pattern of tongue movement with a more posterior position of the tongue, and with an increase in the vertical and a decrease in the sagittal components of the movement pattern.
在正畸学中，舌功能障碍被视为错牙合畸形发展的一个因素。一种用于检查舌运动的新的客观方法是电磁关节造影术（EMA）。这使得能够利用感应距离测量原理追踪舌的运动。一个由丙烯酸材料制成的头盔作为三个发射线圈的载体。这些线圈位于前额前方、下巴前方和颈部后方。接收线圈固定在舌尖和舌背的两个点上。接收线圈和发射线圈之间的距离通过个人计算机计算得出。运动轨迹以x - y坐标显示在计算机屏幕上。展示了一名前牙开牙合患者在特征性测试音和吞咽过程中的舌运动。第一次检查是在没有任何正畸矫治器的情况下进行的。在同一次检查中的第二个系列中，在带有尖刺的正畸矫治器的影响下记录舌运动。在没有正畸矫治器时，患者舌的运动模式呈现垂直与矢状成分相结合的情况，而在带有尖刺的正畸矫治器的影响下，同一名患者舌的休息和工作位置发生了变化，舌运动模式也发生了改变，舌的位置更靠后，运动模式的垂直成分增加，矢状成分减少。
