Rapid prototyping drill guide template for lumbar pedicle screw placement  

作　　者：陆声 徐永清 张元智 李严兵 师继红 陈国平 陈玉兵 

机构地区：[1]Department of Orthopedics, Kunming General Hospital, Chengdu Military command of PLA, Kunming 650032, China [2]Department of Orthopaedics, First Hospital Affiliated to the Inner Mongolia Medical College, Hohhot, Inner Mongolia Autonomous Region, China [3]Department of Anatomy, Nanhua University, Henyang, China

出　　处：《Chinese Journal of Traumatology》2009年第3期177-180,共4页中华创伤杂志（英文版）

基　　金：This project was supported by China Postdoctoral Science Foundation （20080431420） and Yunnan Natural Science Foundation （2008CD210）.

摘　　要：Objective： To develop a novel method of spinal pedical stereotaxy by reverse engineering and rapid prototyping techniques, and to validate its accuracy by experimental and clinical studies. Methods： A 3D reconstruction model for the desired lumbar vertebra was generated by using the Mimics 10.11 software, and the optimal screw size and orientation were determined using the reverse engineering software. Afterwards, a drill template was created by reverse engineering principle, whose surface was the antitemplate of the vertebral surface. The drill template and its corresponding vertebra were manufactured using the rapid prototyping technique. Results： The accuracy of the drill template was confinned by drilling screw trajectory into the vertebral biomodel preoperatively. This method also showed its ability to customize the placement and size of each screw based on the unique morphology of the lumbar vertebra.The drill template fits the postural surface of the vertebra very well in the cadaver experiment. Postoperative CT scans for controlling the pedicle bore showed that the personalized template had a high precision in cadaver experiment and clinical application. No misplacement occurred by using the personalized template. During surgery, no additional computer assistance was needed. Conclusions： The authors have developed a novel drill template for lumbar pedicle screw placement with good applicability and high accuracy. The potential use of drill templates to place lumbar pedicle screws is promising, Our methodology appears to provide an accurate technique and trajectory for pedicle screw placement in the lumbar spine.

关 键 词：NEURONAVIGATION TEMPLATE Lumbar vertebrae Bone screws 

分 类 号：R687.3[医药卫生—骨科学]