[Quantitative assessment to the effect of HGAC treatments].
OBJECTIVE
To evaluate the treatment effect of skeletal class II malocclusion with HGAC.


METHODS
Seventeen skeletal Class II cases were selected and treated with HGAC, pre-treatment and post-treatment cephalometric radiographs were analyzed by Pancherz analysis.


RESULTS
Maxillary growth was inhibited by HGAC, especially in vertical direction. Mandibular retrognathism was improved significantly in horizontal direction. Meanwhile, the upper incisors were retruded and intruded.


CONCLUSIONS
HGAC was effective in the correction of skeletal class II malocclusion.
Chen
Wei
W
Department of Orthodontics, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China. chenwei6048@sina.co
You
Qing-ling
QL