This study showed the relation between them.When M/F =-9. 15: 1, it bringed the result of the controlled tipping movement;

• 本研究显示了三秒基本移动型与载之间的关系：当W/F=-9.；15:1时，牙齿以牙根尖点为中心转动，即可控的倾斜移动；