Comparative study of the treatment of skeletal Class II malocclusion in adults with micro-implant anchorage and headgear anchorage technique

Objective To compare the clinical efficacy of micro-implant anchorage(MIA) and headgear anchorage(HGA)in the treatment of skeletal Class II malocclusion in adults.Methods Twenty-six adult patients with skeletal Class II malocclusion were divided into two groups,MIA group(n=16) and HGA group(n=10).The cephalometric analysis was carried out before and after treatment,and the dental and skeletal changes were compared between two groups.ResultsThe methods showed similar results in skeletal changes,overjet and overbite.However,there was significant difference in the movements of upper incisors and molars between MIA and HGA group(P0.05).The distance of upper molar movement was 1.1mm in MIA group and 2.6mm in HGA group.The incisors were more retracted in MIA group(8.9mm) than in HGA group(5.5mm).Conclusion Both methods can achieve acceptable results.Compared with HGA,MIA was more effective in controlling the mesial movement of upper molar and the retraction of upper incisors.