[The soft tissue change of Angle's Class II division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment].
OBJECTIVE
This study is to evaluate the soft tissue change of Angle's Class II division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment, and to provide experimental results to help to make orthodontic treatment plan and treatments.


METHODS
38 Angle's Class II division 1 malocclusion patients with vertical growth pattern and with tooth extraction orthodontic treatment were included in this study. The pre- and post-treatment cephalometric X-rays were made and 26 measurement items were measured. The change value of pre- and post-treatment, youngsters and adults were compared.


RESULTS
TUL-EP, TLL-EP, upper and lower lip position, Stoms-Stomi, U1-Ptm were reduced after treatment. Upper lip sulcus and flange thickness, upper and lower lip length, upper and lower lip inclination angle, nasolabial angle, Z angle, mentolabial sulcus inclination angle were enlarged after treatment. The upper lip sulcus thickness, lower lip length and A'-Ptm of adolescent were enlarged, but adult were on the contrary. The change of upper lip length, mentolabial sulcus inclination angle and U1-Ptm between adolescent and adult was statistically different.


CONCLUSIONS
The best treatment period of patients with Angle's Class II division 1 malocculsion with vertical growth pattern was in the rapid growth and development period of adolescent.
Peng
Ming-Hui
MH
Shanghai Luwan Dental Clinic, Shanghai 200023, China.
Meng
Qiu-ju
QJ
Wang
Lei-chang
LC
D000293:Adolescent; D000328:Adult; D002508:Cephalometry; D006801:Humans; D008046:Lip / Q000033:anatomy & histology*; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000601:surgery*; D014081:Tooth Extraction