Impact of four-rod instrumentation and interbody cages on pseudarthrosis and rod breakage in adult spinal deformity surgery with pelvic fixation and Schwab grade 2 osteotomies: a combined finite element model and clinical data analysis.

Key Points

• The aim is to evaluate the effects of four-rod instrumentation and interbody cages on pseudarthrosis and rod breakage in adult spinal deformity surgeries.
• Utilized combined finite element model and clinical data analysis.
• Assessed surgeries involving pelvic fixation and Schwab grade 2 osteotomies.
• Measured rod strain and risk of pseudarthrosis/rod breakage.
• Significantly reduced rod strain with four-rod instrumentation and interbody cages.
• Decreased risk of pseudarthrosis and rod breakage compared to standard methods.
• Improved patient-reported outcome measures and reduced need for unplanned reinterventions.