Pedicle Screws 101 

Posted bythespinebookadminPosted inTechniques

This section summarizes the anatomic considerations related to posterior instrumentation with respect to 

  • Start Points 
  • Trajectory 
  • Pedicle Diameters 
  • Types of Instrumentation 

Lumbar 

  • Start Point 
    • 50% TP 
    • Lateral edge SAP 
    • Mamillary processes 
  • Trajectory 
    • L1234 almost straight 
    • L5 30 degrees medial 
  • Pedicle Diameter 
    • Increases L1-L5 
  • Pearls 
    • PSIS can interfere with instrumentation handles on L5