青春发育后期男性高角型与低角型形成机制的多因素分析

Multiple regression analysis of the mechanism of hyperdivergency and hypodivergency development

目的 :对高角型与低角型硬组织特征进行研究 ,以对其病因、机制及临床治疗提供参考。方法 :选取青春发育后期男性高角型和低角型患者共 72例 ,进行X线头影测量 ,收集其硬组织特征资料 ,并进行单因素及多因素分析。结果 :①两组患者在上下颌骨测量方面以及牙合方面 ,存在广泛而显著的差异 ;②多因素逐步回归分析得出高角组回归方程为Y1=-70 .44 0 + 0 .0 3 8X1+ 1.160X2 + 0 .5 88X3 ,低角组回归方程为Y2 =-63 .777+ 1.0 68X1+ 0 .5 95X2 + 0 .3 2 1X3 。显示与高低角形成机制有关的重要因素有 3个 ,依次为 :①ANS Xi Pm ;②AUFH ;③ALFH/AUFH。结论 :多因素回归分析可以揭示高角型与低角型形成机制的有关骨骼因素、齿槽因素之间的内部联系 。

Objective: To study the mechanism of hyperdivergency and hypodivergency development. Methods: 39 subjects of hight angle (MP/FH>30°) and 33 subjects of low angle (MP/FH<20°) were examed cephalometrically. The cephalometric characters of hard tissue were analysed by t test and multiple regression analysis. Results: ① Cephalometric analysis of the two groups revealed significant differences in various measurements of mandibular and dentoalveolar. ②Multiple regression analysis of the measurments in high angle subjects and low angle subjects revealed that ANS Xi Pm, AUFH and ALFH/AUFH might be related to the development of high angle or low angle. The high angle regression equation was Y 1=-70.440+ 0.038 X 1 +1.160 X 2+0.588 X 3, and the low angle regression equation Y 2= -63.777 +1.068 X 1+0.595 X 2+0.321 X 3. Conclusion: The main factors of high angle or low ange development may be ANS Xi Pm, AUFH and ALFH/AUFH.