金属网球后凸成形装置生物力学检测及体外试验

目的检测记忆金属网球的生物力学性能,并探讨金属网球后凸成形装置应用于骨质疏松性椎体压缩骨折治疗的可行性。方法采用不同直径镍钛记忆合金丝编织高弹金属网球,将两端圆孔和周围固定后检测金属网球抵抗压缩力,并制作金属网球拉伸和挤压后凸成形装置,观察其进行后凸成形术的效果。结果随镍钛记忆合金丝直径的增大,其最大抵抗压缩力逐渐升高,直径0.38mm合金丝编织的金属网球抵抗压缩力达到162.39N,金属网球后凸成形装置可通过椎弓根进行后凸成形术。结论金属网球后凸成形装置是治疗骨质疏松性椎体压缩骨折的一种新方法,其临床治疗效果尚需进一步研究。

Biomechanics measurement and in vitro application of kyphop-lasty instrument with wire netting ball

Objective To measure the biomechanics of memory alloy wire netting ball and investigate the application ofthe kyphoplasty instrument for osteoporosis vertebra compression fracture. Methods Super elasticity netting ball wasmade of memory alloy nickel-titanium wire with different diameter. The loading and unloading strength were measuredafter making the netting ball bipolar and two sides fixed. An instrument was made to extend and compress netting ball toinvestigate its kyphoplasty effect for osteoporosis vertebral compression fracture. Results The maximal loadingstrength increased along with the diameter of memory alloy wire and it could be 162.39 N when using 0.38 mm diameterwire to make netting ball. The kyphoplasty instrument of netting ball could work through pedicle of vertebral arch.Conclusion The kyphoplasty instrument of memory alloy wire netting ball could be a new method to treat osteoporosisvertebra compression fracture, and the clinical effect still need further study.