A retrospective study for vertical control with high-pull headgear in the treatment of high angle cases

VernacularTitle:戴用高位牵引头帽后高角患者的垂直向变化
Author: Li OUYANG ¹ ; Yan-Heng ZHOU ; Min-Kui FU ; Peng DING
Author Information

1. 首都医科大学口腔医学院
Keywords: Extraoral traction appliances; Orthodontic anchorage procedures; Vertical control
From: Chinese Journal of Stomatology 2009;44(1):35-37
CountryChina
Language:Chinese
Abstract: Objective To assess the effectiveness of vertical control with high-pull headgear in the treatment of high angle cases.Methods Forty high angle cases(MP-SN＞40°)were included in this study and all the patients were treated with extraction.Twenty patients in the study group and control group,respectively.Totally 14 cephalometric measurements were selected for the assessment.Paired t-test and indepeodent t-test were used in the analysis.Results No significant differences were found between the two groups(P＞0.05).In the study group,after treatment Y angle,MP-SN angle,MP-FH angle and U6-PP distance increased 1.9°,1.5°,2.3°and 1.1 mm,respectively(P＜0.01).Conclusions High-pull headgear could not provide effective vertical control in high angle cases.