Orthodontic treatment of patients with mandibular incisor extraction

VernacularTitle:减数下颌切牙正畸治疗的效果评价
Author: Jianping WEI ; Xizhong ZHANG ; Jiajun MA
Publication Type:Journal Article
Keywords: Mandibular incisor; Extraction; Orthodontics
From: Chinese Journal of Medical Aesthetics and Cosmetology 2015;21(3):165-168
CountryChina
Language:Chinese
Abstract: Objective To evaluate the indications and effectiveness of lower incisor extraction in orthodontics.Methods Twenty-three adult patients with lower incisor extraction were included in the study.The cases consisted of 14 female and 9 male patients with an average age of 23.2 years at the start.One single lower incisor was extracted in 17 patients and the other tow upper premolars were extracted in 6 patients.Cephalometric and casts analyses were carried out.Results Total treatment time was 13-23 months.All extraction space was closed after the treatment.All patients achieved satisfactory treatment results,with normal overbite and overjet and stable occlusal relationship.There were no significant changes before and after treatment on cephalometric analysis.The intercanine width was reduced by from pretreatment to posttreatment [(26.89--2.89) mm vs (23.92-t-1.54) mm (P＜0.05)].Conclusions The intercanine width is reduced after lower incisor extraction.In order to achieve satisfactory clinical effect,we should carefully select cases and pay attention to the corresponding techniques and methods.