A vertical load of 15N was applied at the occlusal surface of the affected side and the boundary conditions, loading locations and directions are shown After that, a vertical load of 100N and a horizontal load of 50N were applied at the same time and the
same points, which equaled a lateral load of 150N that had an angle
of 26.51 with the vertical plane. Restraints were set around foramen magnum to prevent displacement of the head when loading.