骨性Ⅲ类错畸形正颌患者颅面部硬组织特征的Delaire头影测量初步研究

Preliminary research of cranio-maxillo-facial hard tissue structure feature of skeletal class Ⅲ malocclusion orthognathic patients with Delaire cephalometric analysis

目的采用Delaire头影测量方法分析骨性Ⅲ类正颌患者颅面部硬组织特征，为正畸-正颌联合治疗的术前正畸、模型外科设计提供参考。方法采用计算机辅助Delaire头影测量方法对33例骨性Ⅲ类正颌患者（18～39岁，ANB角〈-4°）的颅颌面硬组织特征进行测量分析，采用SAS9．0进行Tukey检验和ANOVA分析。结果本研究发现骨性Ⅲ类错[牙合]畸形正颌患者的颅面部硬组织特征可区分为低角型、高角型、上颌正常型和关节窝后移型，4组均数ANOVA分析发现，11项分析指标的均数差异均有统计学意义（P〈0．05）。结论采用Delaire头方法可较全面识别骨性Ⅲ类错[牙合]畸形发育特征并进行相应的正畸-正颌诊断设计，利于术后疗效的稳定、协调，值得临床上应用并推广。

Objective To analyze the cranio-maxillo-facial hard tissue structure feature with skeletal class Ⅲ malocclusion with Delaire cephalometric analysis, which will guide the orthodontic treatment before orthognathic surgery and the model surgery. Methods Lateral cephalometric radiographs of 33 patients with skeletal class Ⅲ occlusion （18-39 years old,ANB〈-4°） were evaluated with the same standard. The cranio-maxillo-facial hard tissue marks of each radiograph were measured with computer assistant Delaire cephalometric analysis. The data got from corresponding measure index were dealed with Tukey＇s test and ANOVA analysis through sAsg. 0 statistical software. Results The cranio-maxillo-facial hard tissue structure feature of skeletal class Ⅲ could be divided into four classifications through Delaire cephalometric analysis including hypodivergent, hyperdivergent, maxilla normal and glenoid fossa retrocession. Eleven parameteres of four groups had significant variability through ANOVA analysis（P〈0. 05）. Conclusion The Delaire cephalometric analysis can identify growth feature of skeletal class Ⅲ malocclusion and formulate treatment planning for orthognathic surgery, which is very helpful to stability and harmony after the orthognathic surgery, so it is worth using and popularizing in clinic.