采用Delaire分析法探讨安氏Ⅱ类骨性错颅面形态特征

Delaire analysis of the morphology and configuration of skeletal Class Ⅱ craniofacial malocclusion

目的通过Delaire分析法对安氏Ⅱ类骨性错畸形致病机制进行分析,探讨安氏Ⅱ类骨性错畸形的颅面形态特征。方法选择2004～2006年重庆医科大学口腔医院正畸科确诊为安氏Ⅱ类骨性错患者155例,按照MP/SN和MP/FH值,分成均角组、低角组,高角组,采用改良Delaire分析法分析,获得的数据采用SAS8.2统计软件进行两样本均数差别t-检验分析。结果三组Ⅱ类骨性错畸形在颅、颌、面结构比例上有显著性差异,具有不同的颅面部平衡特征。结论Delaire头影分析法直观地显示了颅底结构、颅底曲度与上颌旋转生长、关节窝及髁突、下颌骨位置改变的相关关系,对上、下颌骨位置与颅颈结合的定量描述,可揭示Ⅱ类骨性错的致病机制。

Objective To investigate the pathogenesis of skeletal Class Ⅱ eraniofaeial malocclusion by Delaire analytical method and explore the morphology and configuration of skeletal Class Ⅱ craniofacial malocclusion. Methods A total of 155 patients with Class Ⅱ eraniofaeial malocclusion were selected in this study, which were divided into three groups： average face type, short face type（SFF） and long face type（LFT） based on the value of the MP/SN and MP/FH, and analyzed by improved Delaire analytical method. Independent-samples t-test were used to analyze the data. Results The configuration and proportion of cranium, cranio-occlusion and cranio-face were significantly different among the three groups. The three groups had different craniofacial balanced features. Conclusion Delaire eephalometry analysis can intuitionisticly show the relationship between the craniofacial structures,the flexure of the cranial base and the variation of maxillary rotational growth, the glenoid fossal, the condyle, and the change of mandibular location. The quantificational description to the location of maxilla, mandible and the cranioeervical junction can reflect the pathogenesis of skeletal class Ⅱ eraniofaeial malocclusion.