头颅矢状水平向平面角与面部生长型的相关研究

A corelationship study between facial growth pattern and sagittal horizontal plane angles

目的 研究面部生长型与头颅矢状水平向平面角的关系 ,验证面部后前面高比的诊断意义。方法 摄取 6 5例青年恒牙牙合头颅侧位X线片 ,应用计算机图形分析系统测量出包括PP、MP、OP、SN平面在内的七项测量值及后前面高比值 ,并进行相应统计学分析。结果 ①四个水平向平面角 (OP -FH ,MP -FH ,PP -FH ,SN -FH)与后前面高比呈负相关 ,确定系数 90 .7%。②上下颌平面角与后前面高比值有极高相关性 ,确定系数为6 8.8%。结论 ①面部后前面高比可以反映矢向骨骼的离散程度。

Objective To study the relationship between facial growth pattern and sagittal horizontal plane angles.Methods The cephalometric radiographs of 65 young adults were measured,the corelationship between posterior-anterior ratio and the seven angle measurements (PP,OP,MP,SN planes including angles) were analysised by statistic methods.Results ①Minus corelation was found between the four angles consisted of sagittal horizontal planes and the posterior-anterior ratio.②The PP-MP angle was significantly coincided with the posterior-anterior ratio and the squared multiple R was 0.688 .Conclusion ①Facial posterior-anterior ratio could reflect the diverse degree of Sagittal skeletion.②PP-MP angle could be used as an indicator for confirming the facial growth pattern in clinic.