Paper Info
Title
Computer aided design and evaluation of new anatomic fixation system on entire pelvic model
Abstract
This paper presented a special computer aided procedure to design a new sacroliliac anatomic bar-plate internal fixation system, and evaluated its biomechanical properties on an accurate patient-specific finite element model of entire pelvis, compared with two conventional internal fixation methods. Based on virtual anatomical measure of 30 digital pelvic models reconstructed from CT, an anatomic plate was designed according to the complicated structure of the outer table of the posterior ilium, and was integrated into the complete fixation system. Then, an ad hoc semi-automatic mesh generator was employed to construct a patient-specific finite element model of whole pelvis, including elaborate sacroiliac joints, important pelvic ligaments, and interpubic disc, as well as position-dependent cortical thickness and trabecular bone elastic modulus. Following, one side of sacroiliac joint related ligaments were deleted to simulate a complete unilateral sacroiliac joint disruption. Then the new anatomic fixation system was integrated to fix the fracture, and two comparing models including iliosacral screw fixation and front reconstruction plate fixation were also generated. Finally, all models were simulated under same loading conditions. The results demonstrated that the mechanical stability of the new anatomic fixation system was superior, with obviously improved stress distribution and little displacement, which implied an effective internal fixation method for potential clinical application.
Year
DOI
Venue
2009
10.1145/1629255.1629299
Symposium on Solid and Physical Modeling
Keywords
Field
DocType
new anatomic fixation system,entire pelvic model,anatomic plate,complete fixation system,new sacroliliac anatomic bar-plate,effective internal fixation method,elaborate sacroiliac joint,iliosacral screw fixation,conventional internal fixation method,internal fixation system,front reconstruction plate fixation,comparative modeling,finite element model,elastic modulus,mesh generation,finite element modeling,computer aided design
Biomedical engineering,Topology,Computer science,Computer-aided,Computer Aided Design,Internal fixation,Finite element method,Sacroiliac joint,Fixation (histology),Pelvis,Mechanical stability
Conference
Citations 
PageRank 
References 
0
0.34
3
Authors
3
Name
Order
Citations
PageRank
Shenghui Liao17014.44
Ruofeng Tong246649.69
Min Tang362351.33