Comparison of the bending performance of solid and cannulated spinal pedicle screws using finite element analyses and biomechanical tests

Highlights • Bending performances of solid and cannulated spinal pedicle screws were analyzed and compared using finite element analyses and biomechanical tests. • Cylindrical spinal pedicle screws with a cannulated design had significantly poorer bending performances. • Conical spinal pedicle screws maintained their bending performances, whether they were solid or of a cannulated design. • Adding a pin to the cannulated spinal pedicle screws did not improve the bending performances.