旋转方向
note the difference in the sense of rotation: counter-clockwise in the northern hemisphere, and clockwise in the southern hemisphere.
留意它们不同的旋转方向:在北半球是反时针方向,在南半球则是顺时针方向。
When the directions of the maxillary distally directed orthopedic forces from upper first molars by face bow were+ 30 °~-30 ° the maxilla rotated in clockwise sense and the extent of rotation gradually increased.
后牵引的牵引角度由+30°~-30°时(用口外弓从上第一磨牙牵引),上颌骨呈顺时针旋转,旋转的量逐渐增大。
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