Alan H. Daniels

Rethinking sagittal alignment: the value of evaluating spinal shape in conjunction with T4-L1 pelvic angle measurement to prevent proximal junctional failure.

OBJECTIVE The T4-L1 pelvic angle (T4-L1PA) has been proposed as a novel alignment target associated with mechanical complications in long-segment adult spinal deformity (ASD) surgery. However, its relationship to proximal junctional failure (PJF) and its relevance in shorter thoracolumbar constructs remain unclear. The...

Postoperative thoracic kyphosis morphology following adult spinal deformity surgery: an analysis of fused and unfused segments.