[Effects of Fränkel II appliance on sagittal dimensions of upper airway in children].
OBJECTIVE
The purpose of this study was to investigate the effects of Fränkel II appliance on the upper airway of children.


METHODS
The subjects consisted of 20 patients with Angle Class II, division I malocclusion (10 males and 10 females). The ages of all cases were ranged in 9-10 years. Each experimental subject was also served as self-control and cephalometric analysis was conducted.


RESULTS
Compared with the results of pretreatment, the distance of PNS-Ba, SPP-SPPW, P-T, V-LPW and the Mcnamara line increased remarkably.


CONCLUSIONS
The Fränkel II appliance can improve the sagittal dimensions of the upper airway in children.
Gao
Hui
H
Department of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
Xiao
Danna
D
Zhao
Zhihe
Z
D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000628:therapy*; D017289:Orthodontic Appliances, Functional; D009971:Orthodontics, Corrective / Q000295:instrumentation*; D010614:Pharynx / Q000033:anatomy & histology*; D011859:Radiography; D012137:Respiratory System / Q000033:anatomy & histology; D012886:Skull / Q000000981:diagnostic imaging