Fixation for femoral neck fracture based on nonlinear materials
- VernacularTitle:基于非线性材料股骨颈骨折固定方式
- Author:
Mo-nan WANG
1
;
Hong-shu GUO
1
Author Information
1. Mechanical and Power Engineering College，Harbin University of Science and Technology
- Publication Type:Journal Article
- Keywords:
Femoral neck fracture;
Fixation;
Material properties;
Finite element analysis;
Loads;
Biomechanics
- From:
Journal of Medical Biomechanics
2012;27(2):E152-E158
- CountryChina
- Language:Chinese
-
Abstract:
Objective To make a reasonable selection from internal fixation Methods for treating femoral neck fracture, namely the fixation angle of a single screw, the number of screws and the combination mode of screws, so as to obtain the optimal stability of fracture reduction. Methods Based on the DICOM data and Lindon mode, a three-dimensional finite element model of femoral neck fracture fixation was built including different angles, numbers and combination modes of the screws. The model was attributed to nonlinear material properties based on the relationship between the property parameters of bone materials and the gray value of CT images, and loaded under the simulation of physiological loads. Results Corresponding to different angles of the fracture surface, the optimal fixation angle of the single screw was 65°and 70°in clinic. The more the number of screws, the better the effect of fixation, when the surgical condition was permitted. The inverted triangle placement was better than the triangle placement in case of three-screw fixation, while the triangle placement was superior to two-screw fixation, but the decision on the placement of two-screw fixation in flat form or diagonal form depended on the angle of the fracture surface. Conclusions Different angles of the fracture surface have significant impacts on the effect of fixation, and the loading simulation process on the three-dimensional model can provide a feasible way to the study of the fixation for the femoral neck fracture.
