The bionics of optimal control of jaw movement during mastication : occlusal condition, texture of bolus, control of reflex

当我们在2003年完成这项研究时，我们测量了各种食物在咀嚼过程中变化的特征，并确定为物质数据。此外，我们还测量了咀嚼颌的运动。结果表明，咀嚼颌运动受牙周机械感受器和肌纺锤体的机械刺激的影响，从而有效地控制破坏颗粒。在此基础上，建立了一种三维有限元模拟的方法，这是一种计算机计算动力学技术，将其发展为仿生学。采用非接触式表面形貌测量系统对上下牙的表面形貌和位置关系进行了测量，并根据形貌测量、丸体特征、下颌运动等数据建立了三维有限元模型。由此可以揭示丸在口腔中的行为与牙齿、牙周韧带和下颌骨所受的应力之间的关系。2004年，将该方法应用于正常咬合和错咬合，并研究了球体特征与咀嚼颌运动的关系。结果表明，牙合错导致的咀嚼功能障碍。

When we accomplished this study, in 2003, we measured the characteristics of various food which varied during mastication, and determined as material data. In addition, we measured the masticatry jaw movement. As a result of these, it is suggested that the masticatory jaw movement that it was influenced from mechanical stimulation to a periodontal mechanoreceptor and a muscle spindle in order to be controlled to destroy bolus efficiently.Furthermore, we established a method to simulate by the three dimensions limited element analysis that was a kind of calculation dynamics technique with a computer to develop it as bionics. Surface morphology and positional relationship of upper a d lower teeth were measured by using a non-contact-type surface morphology measurement system and made the three dimensions limited element model on the basis of the data from the morphology measurement, characteristics of the bolus, jaw movement. By this, it was able to reveal the relationship between the behavior of bolus in mouth and the stress to teeth and periodontal ligament and mandible.In 2004, this method applied to normal occlusion and malocclusion and examined the relationship between characteristics of bolus and the masticatry jaw movement. By this, it was able to reveal the chewing functional disorder by malocclusion.