Conclusion: The stresses were complicated.The tendency of the archonege molar were unequivalent.The above results provided a reference for Begg technique and edgewise technique.

• 结论： 支抗磨牙及其牙周组织应力复杂，牙的各部分运动趋势不平衡，且提示上述结论同样适合于方丝弓技术。