Navigation template for sacral fracture fixation using three-dimensional reconstruction and reverse engineering technique
10.3760/cma.j.issn.1671-7600.2009.04.010
- VernacularTitle:骶骨骨折手术导航模板的设计与临床应用
- Author:
Yuanzhi ZHANG
;
Sheng LU
;
Yong YANG
;
Dan JIN
;
Li XIE
;
Yongqing XU
;
Guoxian PEI
- Publication Type:Journal Article
- Keywords:
Sacrum;
Fractures;
Surgery,computer-assisted
- From:
Chinese Journal of Orthopaedic Trauma
2009;11(4):334-337
- CountryChina
- Language:Chinese
-
Abstract:
Objective To provide a new method for sacral fracture fixation by means of 3D recon-struction and reverse engineering technique. Methods Pelvis images of 3D CT scan were obtained from patients with sacral fracture. The digital data were transferred into a computer workstation. 3D models of pelvis were reconstructed using Amira 3.1 software and saved in STL format. The 3D fracture models were imported into Imageware 10.0 software. Different situations of reduction (total reduction, half reduction and no-reduction) were simulated using Imageware 10.0 software. The extract locations and the best directions of inserting iliosacral lag screws were defined using Reverse Engineering according to the 3 situations to before navigation templates were designed according to the posterior anatomic features of the ilium and the insertion channels. Exact navi-gational templates were manufactured by rapid prototyping. Drill guides were sterilized and used intraoperatively to assist surgical navigation and placement of iliosacral lag screws. Results Accurate screw placement was confirmed with postoperative X-ray and CT scanning. The navigation templates were found to be helpful and highly accurate. Conclusion The navigation template may be a useful method for mini-invasive fixation of sacroiliac joint fracture.
