1. 踏板：balance brought forward || 上期结转, 余额承前 | balance brow || 踏板 | balance bush || 平衡衬套
1. Conclusion: Segmental cobb angle in sagittal plane and neutrality chin brow-vertical angle are very important to rebuild the balance of spine in sagittal plane.
结论测量脊柱矢状面不同部位的后凸角度，根据颏眉垂线角，确定截骨部位和后凸角度对于重建矢状面平衡具有重要意义。