按照临床矫治骨型Ⅲ类错(牙合)前牵引上颌的方法,用激光全息干涉计量术测定了恒牙列早期尸体颅骨上颁复合体受不同大小、不同矢状方向前牵引力后的微小三维位移场。其结果表明,颅面骨受力后的初期位移与矫治力大小之间在一定范围内存在明显的直线回归关系;沿(牙合)平面与正中矢状面成不同夹角前牵引时。以与矢状面平行的前牵引方向为佳,为临床前牵引矫治Ⅲ类错(牙合)提供了生物力学依据。 According to the method of tractioning the maxilla before the clinical treatment of type Ⅲ malocclusion, laser holographic interferometry was used to measure the microscopic three dimensional Displacement field. The results show that there is a clear linear regression relationship between the initial displacement and the correction force in the range of craniofacial force after a certain range of traction. With the sagittal plane parallel to the direction of the pre-traction is better, for the pre-clinical traction malocclusion Class Ⅲ provide a biomechanical basis.