哈尔滨地区错畸形患者β角的测量分析研究

151 cases of malocclusion in patients with β angle measurement and analysis

目的:本研究使用β角来评价上下颌骨的矢状向关系,据此得出安氏3种错类型<bet a角的正常值范围。方法:选取151例11～20岁患者的头颅侧位片进行X线头影测量分析,按ANB角、Wi t s值分为3组,得到平均值和标准差,分析男女差异。结果:①分析安氏3种错类型患者β角的正常值;②分析3组间差异有统计学意义(P<0.05);③各组W值在性别上没有显著差异。结论:bet a角可以评价上下颌骨矢状向关系,具有较好的可重复性。

Objective The purpose of this study was to introduce a cephalometric measurement,named the βangle,to assess the sagittal relationship between maxilla and mandible with accuracy and reproducibility.Methods One hundred and fifty-one pre-treatment cephalometric radiographs of patients between the age of 11 and 20 years were selected.They were again subdivided into Classes I,II,and III groups on ANB angle and Wits appraisal.The mean and the SD for the β angle were calculated.Next,the differences between genders were analyzed.Finally,using the one-way analysis of variance and the Newman-Keuls test,we compared the data with those three groups.Results The cephalometric standard values with normal occlusion were established.Moreover,three groups was distinctly in statistic（P0.05）.There existed no statistically significant differences between genders.Conclusion The β angle was developed as a method to evaluate the sagittal jaw relationship.