[A retrospective study for vertical control with high-pull headgear in the treatment of high angle cases].
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 degrees) 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 independent 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 degrees, 1.5 degrees, 2.3 degrees and 1.1 mm, respectively (P < 0.01).


CONCLUSIONS
High-pull headgear could not provide effective vertical control in high angle cases.
Ouyang
Li
L
Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Zhou
Yan-Heng
YH
Fu
Min-Kui
MK
Ding
Peng
P
D000293:Adolescent; D000328:Adult; D005115:Extraoral Traction Appliances; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000000981:diagnostic imaging / Q000628:therapy*; D052280:Orthodontic Anchorage Procedures; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult