About this Medicine article
Cranially Directed Upper Instrumented Vertebrae Screw Angles Are Associated With Proximal Junctional Kyphosis in Adult Spinal Deformity Surgery by Jeffrey W. Chen; Michael Longo; Hani Chanbour; Matthew E. LaBarge; Amir M. Abtahi; Byron F. Stephens; Scott L. Zuckerman is a Medicine article available to read on EtoBox.
## Study Design. A retrospective cohort study. ## Objective. To evaluate the impact of the upper instrumented vertebral (UIV) screw angle in adult spinal deformity (ASD) surgery on: (1) proximal junctional kyphosis/failure (PJK/F), (2) mechanical complications and radiographic measurements, and (3) patient-reported outcome measures (PROMs). ## Summary of Background Data. The effect of UIV screw angle in ASD surgery on patient outcomes remains understudied. ## Materials and Methods. A single-institution, retrospective study was undertaken from 2011 to 2017. UIV screw angle was trichotomized into positive: cranially directed screws relative to the superior endplate (2°≤θ), neutral: parallel to the superior endplate (−2°<θ<2°), and negative: caudally directed screws relative to the superior endplate (−2°≥θ). The primary outcome was PJK/F. Secondary outcomes included remaining mechanical complications, reoperation, and PROMs: Oswestry Disability Index, Numeric Rating Scale (NRS) back/leg, and EuroQol. Regression controlled for age, body mass index, postoperative sagittal vertical axis (SVA), and pelvic incidence lumbar-lordosis mismatch. ## Results. Among 145 patients undergoing ASD su
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- Author
- Jeffrey W. Chen; Michael Longo; Hani Chanbour; Matthew E. LaBarge; Amir M. Abtahi; Byron F. Stephens; Scott L. Zuckerman
- Publisher
- Ovid Technologies (Wolters Kluwer Health)
- Published
- 2022
- Language
- EN
- Field
- Medicine (Health Sciences)