The occlusion plane changes of the adults with Angle class Ⅱ division 1 hyperdivergent malocclusion treated by different anchorages
Abstract：AIM:To investigate the occlusion plane changes and the mandibular plane angle changes in the adults with Angle class Ⅱ division 1 hyperdivergent malocclusion treated by different anchorages.METHODS:40 patients (aged 18-30 years) with Angle class Ⅱ division 1 hyperdivergent malocclusion had the 4 1st premolars extracted and were treated with mini-implant anchorage (Group 1,n=20) and conventional anchorage(Group 2,n=20) respectively.Pre-treatment and post-treatment cephalograms were collected and related indexes were measured,data were analyzed.RESULTS:After treatment,in group 1:U1-PP was intruded by (0.62±0.62)mm (P<0.05),SNA decreased by(0.93±1.09)°(P< 0.05).In group 2:the U1-PP was extruded by(0.94±1.27)mm (P<0.05),the U6-PP extruded by(1.41±1.00)mm (P<0.05),the U6-SV mesially moved by (2.56±1.46)mm (P<0.05),SNA decreased by (0.85±0.74)°(P<0.05),SNB decreased by (1.23±0.88)°(P<0.05),the OP-SN angle increased by (2.40±1.48)°(P<0.05),Y angle increased by (1.20±1.36)°(P<0.05),MP-SN and GoGn-SN were increased by (0.08±0.08)° and (0.03±0.94)° respectively (P<0.05).The change of other indexes was not statistically defferent.CONCLUSION:Mini-implants anchorage is more effective than traitional ancohorage in the control of the occlusion plane and the mandibular plane for the treatment of adults with Angle class Ⅱ division 1 hyperdivergent malocclusion.
Keywords：occlusion planemandibular planeanchoragemini-implanthyperdivergent
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 159-163 )