The impact of pedicle screw transitional segment and thread distribution on postoperative rod-screw system failure

Key Points

• This research aims to evaluate how transitional segments and thread distribution of pedicle screws affect the failure of rod-screw systems after surgery.
• Analyzed pedicle screw designs with varying lengths of transitional segments.
• Assessed thread distribution impact on screw performance and stability.
• Examined stress concentrations and bending strength under simulated conditions.
• Longer transitional segments significantly reduce local stress concentrations.
• Optimized thread distribution improves overall screw and rod-screw system performance.
• Reduced risk of postoperative fractures was observed with enhanced screw design.