Objectives. To review the radiographic classification of patients with sagittal imbalance due to lumbar degenerative kyphosis (LDK) and to determine correlation between thoracic and lumbar curve.

• 目的：为综述了因为退行性后凸矢状位不平衡病人的放射分类和为确定胸椎和腰椎曲线的相关性。