When an occlusal load is on the ipsilateral molars, there is a reversal result of the stress direction in the upper line of the mandibular angle.

• 在不同咬合部位的比较中，在四组肌肉同时加载的条件下，前牙咬合加载时下颌角区域的应力值大于双侧后牙咬合加载；