腭平面在下降的同时伴前上旋转趋势，容易引起开。
The forward and upward rotation of palatal plane may lead to open-bite.
头影测量分析显示上颌前部得到有效向前、向下移动；腭平面延长。
Results: Cephalometric analysis revealed that the premaxilla was moved forward and downward and the length of palatal plane increased.
在曲面断层片上分别测量上颌第一和第二磨牙与腭平面所成的角度。
The sagittal inclinations to the palatal plane of the first and second maxillary molars were measured on panoramic tomography.
在曲面断层片上分别测量上颌第一和第二磨牙与腭平面所成的角度。
The sagittal inclinations to the palatal plane of the first and second maxillary molars were measured on panoramic tomography.
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