Evaluation on efficacy of corticotomy-facilitated treatment in skeletal class Ⅱ patients
10.3760/cma.j.issn.1002-0098.2017.07.003
- VernacularTitle: 骨皮质切开术辅助矫治骨性Ⅱ类错畸形的疗效研究
- Author:
Lei CHENG
1
;
Chunyang ZHAO
1
;
Ming LI
2
;
Chengqiong PAN
3
;
Bin YAN
1
;
Lin WANG
1
Author Information
1. Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University & Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China
2. Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University & Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China
3. Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University & Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China [Present address: Department of Orthodontics, Suzhou Huaxia Stomatological Hospital, Suzhou Jiangsu 215000, China]
- Publication Type:Journal Article
- Keywords:
Malocclusion, Angle class Ⅱ;
Cone-beam computed tomography;
Corticotomy;
Case-control studies
- From:
Chinese Journal of Stomatology
2017;52(7):404-409
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effect of corticotomy-facilitated orthodontics on the treatment time and final outcome in skeletal class Ⅱ division 1 patients.
Methods:Twenty adult skeletal class Ⅱ division 1 patients treated with two maxillary first premolar extractions were included and randomly divided into two groups (the corticotomy group and the control group). The treatment time was recorded and the changes of soft and hard tissue were compared by using three-dimensional measurement and analysis of cone-beam CT images before and after treatment.
Results:There was no significant difference in the alignment time between two groups, while the time of maxillary space closure and the total treatment time in corticotomy group ([5.8±1.3] and [24.9±5.1] months, respectively) were shorter than that in the control group ([9.9±1.1] and [30.8±4.6] months, respectively) and the differences were significant (P<0.01). In the corticotomy group, the retraction amount of the upper central in cisal margin, apical tip, supradentale, labrale superius and the increase of nasolabial angle were greater than those in the control group (P<0.05).
Conclusions:In patients with mild to moderate skeletal class Ⅱ division 1 malocclusion, corticotomy-facilitated orthodontics can not only shorten the treatment time, but is more conductive to the retraction of upper anterior teeth and improvement of the profile.
