porion

Effect on Standards of Downs Analysis Choosing Different Porion

不同耳点的选择对Downs分析法正常值的影响

Objective To study the location relationship of mechanical Porion ( Po-m ) and anatomical Porion ( Po-a ) in different Angle 's malocclusions .

目的研究安氏Ⅰ、Ⅱ、Ⅲ类错牙合患者头颅侧位定位片上机械耳点与解剖耳点的相对位置关系，探讨两点之间的位置关系是否与错牙合类型有关。

Results : The orientations of porion ? FH plane and the superimpositions of left and right gonion point on modified standard radiographs were more veracity .

结果：标准头颅侧位片定位耳点及眼耳（FH）平面的准确性、左右下颌角区的重叠均高于临床片。

If we look at the drawings from the vertical view , the differences of the cephalofacial morphology were exhibited on the areas at anterior porion . Optical Illusion Elimination of 3D projection and Its Applications

若据俯视投影图，两种颅骨的差异主要出现在外耳道以前的部分。三维形态投影图视错觉的消除与利用