Objective： To provide a new method in the fixation of sacral fracture by means of three-dimensional reconstruction and reverse engineering technique. Methods： Pelvis image data were obtained from threedimensional C...Objective： To provide a new method in the fixation of sacral fracture by means of three-dimensional reconstruction and reverse engineering technique. Methods： Pelvis image data were obtained from threedimensional CT scan in patients with sacral fracture. The data were transferred into a computer workstation. The threedimensional models of pelvis were reconstructed using Amira 3.1 software and saved in STL format. Then the threedimensional fracture models were imported into Imageware 9.0 software. Different situations of reduction （total reduction, half reduction and non-reduction） were simulated using Imageware 9.0 software. The best direction and location of extract iliosacral lag screws were defined using reverse engineering according to these three situations and navigation templates were designed according to the anatomic features of the postero-iliac part and the channel. The exact navigational template was made by rapid prototyping. Drill guides were sterilized and used intraoperatively to assist in surgical navigation and the placement of iliosacral lag screws. Results： Accurate screw placement was confirmed with postoperative X-ray and CT scanning. The navigation template was found to be highly accurate. Conclusion： The navigation template may be a useful method in minimal-invasive fixation of sacroiliac joint fracture.展开更多
AUSTRIA International Atomic Energy Agency＇s（IAEA）Director General Yukiya Amano（center）attends a board of governors meeting at the headquarters of IAEA in Vienna on January 19,discussing the work of inspecting an...AUSTRIA International Atomic Energy Agency＇s（IAEA）Director General Yukiya Amano（center）attends a board of governors meeting at the headquarters of IAEA in Vienna on January 19,discussing the work of inspecting and supervising Iran＇s nuclear activityPAKISTAN Police investigate a suicide blast site at a checkpoint in Peshawar on January 19.展开更多
文摘Objective： To provide a new method in the fixation of sacral fracture by means of three-dimensional reconstruction and reverse engineering technique. Methods： Pelvis image data were obtained from threedimensional CT scan in patients with sacral fracture. The data were transferred into a computer workstation. The threedimensional models of pelvis were reconstructed using Amira 3.1 software and saved in STL format. Then the threedimensional fracture models were imported into Imageware 9.0 software. Different situations of reduction （total reduction, half reduction and non-reduction） were simulated using Imageware 9.0 software. The best direction and location of extract iliosacral lag screws were defined using reverse engineering according to these three situations and navigation templates were designed according to the anatomic features of the postero-iliac part and the channel. The exact navigational template was made by rapid prototyping. Drill guides were sterilized and used intraoperatively to assist in surgical navigation and the placement of iliosacral lag screws. Results： Accurate screw placement was confirmed with postoperative X-ray and CT scanning. The navigation template was found to be highly accurate. Conclusion： The navigation template may be a useful method in minimal-invasive fixation of sacroiliac joint fracture.
文摘AUSTRIA International Atomic Energy Agency＇s（IAEA）Director General Yukiya Amano（center）attends a board of governors meeting at the headquarters of IAEA in Vienna on January 19,discussing the work of inspecting and supervising Iran＇s nuclear activityPAKISTAN Police investigate a suicide blast site at a checkpoint in Peshawar on January 19.
