The soft tissue change of Angle's Class II division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment.
- Author:
Ming-Hui PENG
1
;
Qiu-ju MENG
;
Lei-chang WANG
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Cephalometry; Humans; Lip; anatomy & histology; Malocclusion, Angle Class II; pathology; surgery; Tooth Extraction
- From: West China Journal of Stomatology 2010;28(4):399-407
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEThis 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.
METHODS38 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.
RESULTSTUL-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.
CONCLUSIONThe 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.