Objective The purpose of this study is to evaluate the methods of treatment on Class 1)1 malocclusion with mandib- ular deviations, and clarify the principles of expansion and multiloop edgewise arch wire tecbnique.Methods 8 skeletal class IIl with mandibular deviations patients~selected (male 3, female 5, agedl2-18).They were all corrected with maxillary expan- sion and multiloop edgewise arch wire technique. Results In all~，molar relationships were class I, the overbite and the overjet~normal，and the upper and lower midline were harmony. Conclusion Mild and moderate skeletal classmwith man- dibular deviation can be corrected successfully场maxillary expansion and multiloop edgewise arch wire technique.
