Dentoalveolar compensation in skeletal Class Ⅲ patients treated with orthognathic surgery
10.3760/cma.j.issn.1002-0098.2015.11.004
- VernacularTitle:骨性Ⅲ类错(牙合)手术患者的前牙代偿特征分析
- Author:
Jie ZHANG
1
;
Xiaotong LI
Author Information
1. 100081,北京大学口腔医学院·口腔医院正畸科
- Keywords:
Malocclusion,Angle Class Ⅲ;
Incisor;
Cephalometric analyses;
Compensation
- From:
Chinese Journal of Stomatology
2015;50(11):656-660
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the compensation of the upper and lower incisors in skeletal Class Ⅲ patients treated with orthodontic-surgical approach.Methods The samples consisted of 54 skeletal Class Ⅲ patients treated with orthodontic-surgical approach from November 2011 to January 2015.Lateral cephalograms were taken before treatment.The differences between the samples and the norms from Peking University normal occlusion sample library were assessed using independent-sample t test.Correlation analyses were performed to find associations between skeletal and dental parameters.According to skeletal anteroposterior discrepancy/vertical type (ANB/SN-MP), the samples were allocated into group A (ANB＜-4°, SN-MP≤37.7°, n=1 1), group B (ANB≥-4°, SN-MP≤37.7°, n=16), group C (ANB＜-4°, SN-MP＞ 37.7°, n=14), and group D(ANB≥-4°, SN-MP＞37.7°, n=13).After measurement of variables, one-way ANOVA with SNK multiple comparison test were performed.Results The maxillary incisors were more proclined and the mandibular incisors more retroclined in skeletal Class Ⅲ patients compared with norm values(P＜0.01).Both skeletal anteroposterior discrepancy and vertical type were correlated with the position of upper and lower incisors(P＜0.01).According to skeletal anteroposterior discrepancy/vertical type, no significant differences were found in the upper incisors' inclination among the four groups, while patients in group A and group D exhibited significant difference in lower incisor compensation.Conclusions Different skeletal anteroposterior discrepancy/vertical type resulted in varied incisors' compensation.Therefore,decompensation should be treated differently.
