The Production and Clinical Application of Molar Root Movement Controller
Objective To solve the problem that the molar propeller moving upper simultaneously two molars distally resulted in the first molar tipping and lingual rotation.Methods The first molar was welded with a molar root movement controller, which extending backward and clinging to the edge of second molar dental cervix.Results The molar root movement controller stood on the molar and the stable arm of force resisted the tipping and rotation of the first molar in the process of the molar propeller moving upper molar distally.Moreover, translation of the second molar could move in the limited direction of the first molar controller.Conclusion The molar root movement controller could prevent the side effects and avoid the second molar buccally positioned movement in the process of molar propeller moving the two molars distally.