Study Design. Pedicle screw pullout testing in osteoporotic and control human cadaeric ertebrae, comparing augmented and control ertebrae.

• 研究设计.；我们对人尸体椎骨的骨质疏松组和对照组进行了椎弓根螺钉退出试验，比较强化组和对照组的区别。