7Guyer EC,Ellis EE 3rd,McNamara JA,et al.Components of class Ⅲ malocclusion in juveniles and adolescents.Angle Orthed,1986,56:7-30.
8Shanker S,Ngan P,Wade D,et al.Cephalometric A point changes during and after maxillary protraction and expansion.Am J Orthod Dentofaeial Orthop,1996,110:423-430.
9Liou EJ.Toothbome orthopedic maxillary protraction in Class Ⅲ patients.J Clin Orthod,2005,39:68-75.
10Liou EJ,Tsai WC.A new protocol for maxillary protraction in cleft patients:repetitive weekly protocol of alternate rapid maxillary expansions and constrictions.Cleft Palate Craniofac J,2005,42:121-127.
