@article{ZHANG2016, 
author = {Liao ZHANG and Ying LIU},
title = {A clinical research on the face type and double occlusal plane level change in Angle’s Class Ⅱ, division 2 patients before and after treatment},
year = {2016},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {24},
number = {7},
pages = {411-415},
keywords = {Angle Class Ⅱ, division 2, Occlusal plane, Straight wire appliance, Face height, Cephalometry},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2016.07.007},
doi = {10.12016/j.issn.2096-1456.2016.07.007},
abstract = {ObjectiveTo evaluate the change of the the face type and the cant of the occlusal plane of the patients with Angle Class Ⅱ, division 2 before and after orthodontic treatment, in order provide evidence for clinical treatment.MethodsIn 30 patients with Angle Class Ⅱ, division 2, 4 first premolars were extracted. They were treated with straight wire appliance. Pre-treatment and post-treatment lateral cephalograms of the patients were obtained and evaluated. Seven parameters including AOP-FH, POP-FH, OP-dif, MP-FH, N-Me, N-ANS, ANS-Me were selected and analyzed.ResultsThere were significant differences in AOP-FH, N-Me, POP-FH and ANS-Me (P＜0.05), while there were no significant differences in other parameters.ConclusionAfter the straight wire appliance treatment for Angle Class Ⅱ division 2 patients, heights of 1/3 lower face increases, both anterior and posterior occlusal plane decreases, especially the anterior occlusal plane.}
}