Spinal alignment is essential to a well-functioning musculoskeletal system. Normal standing
orientation as defined by Dubousset 1 is with the skull positioned roughly over the femoral …

Study Design. Retrospective study. Objective. To validate the age-adjusted ideal sagittal
alignment in terms of proximal junctional failure (PJF) and clinical outcomes. Summary of …

Purpose: Adult spinal deformity incidence increases accordingly as the population ages.
Even though surgery is the best option for the treatment, the complications due to surgery …

Study Design. Diagnostic binary threshold analysis. Objective.(1) Perform a sensitivity
analysis demonstrating the test performance metrics for any combination of proximal …

Study Design. Retrospective study. Objective. The aim of this study was to investigate the
long-term fate of asymptomatic PJK focusing on the elderly patients with sagittal imbalance …

Study Design. Retrospective study. Objective. To identify the risk factors for revision surgery
among neurologically intact patients with proximal junctional failure (PJF) after adult spinal …

OBJECTIVE It has been well documented that optimal sagittal alignment is highly correlated
with good clinical outcomes in adult spinal deformity (ASD) surgery. However, it remains to …

OBJECTIVE Score on the proximal junctional kyphosis severity scale (PJKSS) has been
validated to show good correlations with likelihood of revision surgery for proximal junctional …

Background Previous reports with proximal junctional failure (PJF) included relatively young
patients or deformity without sagittal imbalance. The present study focused on the two well …

Background The present study assumed that the effects of deformity correction amounts on
proximal junctional kyphosis (PJK) development after long deformity surgery would vary …