Study on the effect of Herbst appliance in the treatment of patients with skeletal classII malocclusion

Objective To study and observe the effect of Herbst appliance in the treatment of patients with skeletalⅡ II malocclusion.Methods 48 patients with skeletal classⅡ malocclusion in our hospital from June 2011 to July 2012 were selected as research object,and they were randomly divided into control group(Activator appliance group)24cases and observation group(Herbst appliance group)24cases,then the cephalometric indexes and periodontal health related indexes of two groups before and after the treatment were compared.Results The cephalometric indexes of observation group after the treatment were all better than those of control group and those before the treatment,the periodontal health related indexes including plaque index,gingival index and bleeding index at different times after the treatment were all better than those of control group too(all P0.05),there were all significant differences.Conclusion The effect of Herbst appliance in the treatment of patients with skeletal classⅡ malocclusion is better,and the clinical effect is better,at the same time the bad influence for periodontal health is smaller.