脊柱椎弓根动态稳定系统的研制与评价

The Design and Validation of Spinal Pedicle Screw-based Posterior Dynamic Stabilization System

目的评价自主发明设计的脊柱椎弓根动态稳定系统,验证其生物力学稳定性、活动度和疲劳强度。方法有限元方法优化关键结构参数;并根据F1717和12189要求验证系统静态压缩、扭转、压缩疲劳性能。结果有限元分析、物理性能测试均达到预设标准。结论该系统既具有给予病变节段以足够的稳定,又有使该节段保留一定的活动度,这样可以减轻术后邻近节段的退变。

Objective Evaluate an innovative Spinal Posterior Dynamic Stabilization System,and validate the biomechanical stabilization,flexibility and fatigue strength.Methods Optimize the key parameters of the PDS using finite element method,validate the static compression,torsion,compression fatigue performance by physical test.Results The results of FEA and physical test show that the performance of the implant is up to standards set in advance.Conclusion The Spinal Pedicle Screw-based Posterior Dynamic Stabilization System could not only provide enough stabilization,but also keep the flexibility of surgery segment,which would reduce the adjacent segment degeneration disease.