采用颌面部软组织肌力，骨骼生长动力，牙齿萌出动力等自然矫正力来干预和治疗错颌畸形，引导牙列和颌面部向正常方向生长
As we learn more about growth and its potentials, more about the influnences of function on the developing denture, and more about the normal mesiodistal position of the denture in its relation to basal jawbones and head structures, we will acquire a better understanding of when and how to intervene in the guidance of growth processes so that nature may better approximate her growth plan for the individual patient.
“当我们了解了更多关于生长以及生长所蕴含的潜能，更多关于功能对牙列形成的影响，以及更多关于牙列近远中位置与基骨和头颅部结构关系，我们将更好地理解应该何时以及如何介入生长发育的引导，从而使自然可以做出更适合于该患者的生长计划。”
Charles H. Tweed