Vertical Composition Analysis of Craniofacial Types of Xi'an Class III Malocclusion

Objective:To analyze the Xi'an class Ⅲ malocclusion vertical craniofacial type composition.Methods:From 2003-2008 in the Department of Orthodontics,the Fourth Military Medical University Dental Hospital,class Ⅲ permanent dentition malocclusion was studied,using computer-assisted cephalometric X technology,respectively.According to the vertical composition,the patients were divided into 3 groups:high-angle group(V1);both angle group(V2);low-angle group(V3).We analysed the class Ⅲ patients with craniofacial morphology in the vertical composition.Results:The dentition in patients with skeletal class III were vertical angle to the principal,or both for high-performance angle,and low angle was very rare.In the early permanent dentition and permanent dentition,both vertical angle(V2) was mainly,and low-angle(V3) and high-angle(V1) were relatively rare.Conclusion:Among class III malocclusion in Xi'an area,vertical craniofacial types in the composition of different ages were different,but in general,both angle was still the principal manifestation at each period.