重庆地区正常少年头影测量McNamara分析及颅颌线距相关性

目的：建立重庆地区少年X线头影测量McNamara分析法正常值并对其颅颌线距值作相关分析。方法：选择重庆地区13岁左右正常He少年共计55名（其中男27名，女28名），拍摄头颅定位侧位片，建立McNamara分析法正常值并作相关分析。结果：获得重庆地区少年McNamara分析法头影测量正常值，经成组t检验，男女间有效上颌长度，有效下颌长度下前面高，上颌突距有显著性差异，下颌突距，上前牙突距，下前牙突距性别差异不明显。其中有效上颌长度与有效下颌长度，上颌突距与下颌突距，有效下颌长度与下前面高分别有正相关关系，下前面高与下颌突距有一定条件下为负相关关系，并建立回归方程。结论：X线头影测量颅颌线距测量值之间在一定的相关性，可以相互推算。

Correlation between McNamara cephalometric analysis values and craniomaxillary linear parameters in Chongqing adolescents with normal occlusion

Objective:To establish the normal value of McNamara cephalometric analysis in Chongqing adolescents with normal occlusion and to obtain its regression models. Methods:Fifty five Chongqing adolescents with normal occlusion (male 27 and female 28)were taken lateral cephalograms. McNamara analysis was conducted and the correlation analysis was carried out.Results: There were significant differences in the normal values of McNamara analysis between male and female Chongqing adolescents, namely the effective maxillary length, effective mandibular length, lower anterior facial height and A Np line. There were no significant differences in Pog Np line, upper incisor to point A vertical,lower incisor to A P line.There were correlations between the effective maxillary length and effective mandibular length, effective mandibular length and lower anterior facial height, A Np line and Pog Np line, respectively.When effective mandibular length was fixed,lower anterior facial height and Pog Np line was correlated.The regression models were obtained.Conclusion:There is correlation between the linear measurements of the cephalometrics values.