Finite element analysis of biomechanical features of percutaneous C1-2 anterior and posterior transarticular screws
10.3760/cma.j.issn.1001-8050.2014.02.020
- VernacularTitle:经皮C1～C2前路和后路关节突螺钉生物力学特点的有限元分析
- Author:
Hui XU
;
Aimin WU
;
Ou CHEN
;
Huazi XU
;
Xiangyang WANG
;
Yonglong CHI
- Publication Type:Journal Article
- Keywords:
Cervical vertebrae;
Finite element analysis;
Internal fixators;
Surgical procedures,minimally invasive
- From:
Chinese Journal of Trauma
2014;30(2):164-169
- CountryChina
- Language:Chinese
-
Abstract:
Objective To develop a three-dimensional finite element model of atlantoaxial instability and compare the biomechanical properties of percutaneous anterior transarticular screw (ATS) and posterior transarticular screw (PTS) fixations.Methods A pathologic three-dimensional finite element model of atlantoaxial instability was developed from CT images of the upper cervical spine of volunteers with the aid of softwares,such as Mimics,Freeform,and Ansys.Percutaneous C1-2 ATS and PTS fixation modes were simulated and implanted to the model.Under the preload of 40 N and force moment of 1.5 Nm in anterior flexion,posterior extension,lateral bending,and axial rotation,biomechanical properties of the two fixation modes were compared.Results Under the four loading modalities,both fixation techniques provided maximal inhibition on C1-2 movement.The maximal stress for ATS was larger than that for PTS and maximal displacement for ATS was smaller than that for PTS.Conclusions Both ATS and PTS provide similar outlook and are effective to stabilize the atlantoaxial joint.Biomechanical performance of percutaneous C1-2 ATS is better than that of percutaneous C1-2 PTS.
