According to the plane coordinate in each image, buccolingual direction was presented as X axis, mesial-distal direction as Y axis and occlusogingival direction as Z axis.
根据各层图上建
坐标，设颊舌向为X
，近远中向为Y，牙合龈向为Z。
;
;;
坦;,直交;
;
向;, 与地行;，直
;According to the plane coordinate in each image, buccolingual direction was presented as X axis, mesial-distal direction as Y axis and occlusogingival direction as Z axis.
根据各层图上建坐标，设颊舌向为X，近远中向为Y，牙合龈向为Z。
Results Gnathion and gonion showed positive displacement on X and Y axes and negative displacement on Z axis.
颏顶点、下颌角点均表现为X、Y向正位移,Z向负位移。
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