The analysis of the treatment to Class III patients between with modified forsus appliance and with Activator appliance by pancherz

Objective:To evaluate and analysize the effects between with modified Forsus appliance and activator in the treatment of Class II madibular retrusion by Pancherz.Method:40 children with Class II malocclusion and mandibular retrusion were selected and divided into two groups.20 patients treated with this new appliance and other 20 treated with activator.Cephalometric radiographs were taken and analyzed at the pre-treatment time(T1) and the post-treatment time(T2) with the Pancherz analysis.Students' t-test was used to determine if there were significant differences between the 2 time periods.Result:After treatment,profiles of the two groups were obviously improved.The trends were similar in overjet and the molar relationship,SNB and ANB.all had significant differences.Conclusion:Both the modified Forsus appliance and activator appliance combined with straight wire appliance can effectively stimulate the mandibular growth,balance the jaw relationship,and correct the Class II mandibular retrusion.