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.
根据各层图上建立
面坐标，设颊舌
X
，近远中Y，牙合龈Z。
;
, 
地线行;;线;
形;地;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.
根据各层图上建立面坐标，设颊舌X，近远中Y，牙合龈Z。
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我们指正。
