E. Klineberg

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...

The Lower Lordotic Arch More Precisely Predicts Pelvic Positioning for Adult Spinal Deformity Patients with an Aligned T4-L1-Hip Axis.

STUDY DESIGN Retrospective cohort. OBJECTIVE To assess the combined effect of lower lordotic arch (LLA) and thoracolumbar (T4-L1-hip axis) alignment correction on the ability to predict sacral slope (SS) (i.e. pelvic retroversion) in adult spinal deformity (ASD). SUMMARY OF BACKGROUND DATA The Roussouly framework c...

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

C2 Coronal Angle (C2C): A Novel Predictor of Outcomes Following Adult Thoracolumbar Spinal Deformity Surgery.

STUDY DESIGN Retrospective analysis of a multicenter series of deformity patients undergoing thoracolumbar instrumentation to the pelvis. OBJECTIVE Introduce the C2 coronal angle (C2C) as a novel metric, assess its association with quality-of-life and neck-specific outcomes, and compare the strength of this associati...

AO Spine Clinical Practice Recommendations: Proximal Junctional Kyphosis and Failure Prevention

Study Design Literature Review with expert consensus–based clinical practice recommendations. Objectives To synthesize current evidence on risk factors and preventive strategies for proximal junctional kyphosis (PJK) and proximal junctional failure (PJF) following adult spinal deformity (ASD) surgery, and to provide cl...