Proximal Junction Failure in Spine Surgery: Integrating Geometrical and Biomechanical Global Descriptors Improves GAP Score-Based Assessment.

Study Design: Retrospective observational study.

Objective: Biomechanical and geometrical descriptors are used to improve global alignment and proportion (GAP) prediction accuracy to detect proximal junctional failure (PJF).

Summary Of Background Data: PJF is probably the most important complication after sagittal imbalance surgery.