ObjectiveScrew loosening is a common complication following lumbar spine fixation surgery. yet the biomechanical outcomes after screw loosening remain rarely reported. This study aims to utilize finite element (FE) models to compare the biomechanical performance of PEEK rod dynamic fixation and titanium rod rigid fixation in the postoperative lumbar spine. exploring potential biomecha... https://www.roneverhart.com/Christmas-Ornament-Ice-Ball-Molds-Design-Set-Options/