The accuracy of cortical bone trajectory screw placement guided by spinous process clamp hardware in lumbar spinal surgery: a retrospective study

Xi-Nuo Zhang 1, Qing-Jun Su 1, Bao-Qing Pei 2, Ai-Xing Pan 1, Hong-Hao Yang 1, Hong-Tao Ding 1, Yong Hai 1, Yu-Zeng Liu 3