Accuracy of specimen-specific nonlinear finite element analysis for evaluation of radial diaphysis strength in cadaver material
| Autor: | Andrew R. Thoreson, Kazuki Kuniyoshi, Tomoyuki Rokkaku, Kazuhisa Takahashi, Yasufumi Ogawa, Koji Sukegawa, Yusuke Matsuura, Kai Nan An, Takane Suzuki |
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| Rok vydání: | 2014 |
| Předmět: |
Male
Materials science Open Fracture Reduction Finite Element Analysis Biomedical Engineering Bioengineering bone strength forarm fracture Weight-Bearing Metal Artifact Flexural strength Cadaver Bone Density Bone plate Humans Computer Simulation Composite material Aged finite element model Aged 80 and over business.industry General Medicine Structural engineering Radius Finite element method Computer Science Applications Biomechanical Phenomena metal artifact Human-Computer Interaction Nonlinear Dynamics Metals Regression Analysis Female Diaphyses business Cadaveric spasm Artifacts Radius Fractures |
| Zdroj: | Computer methods in biomechanics and biomedical engineering. 18(16) |
| ISSN: | 1476-8259 |
| Popis: | [Abstract] Background: The feasibility of a user-specific finite element model for predicting the in situ strength of the radius after implantation of bone plates for open fracture reduction was established. The effect of metal artifact in CT imaging was characterized. The results were verified against biomechanical test data. Methods: Fourteen cadaveric radii were divided into two groups: 1) intact radii for evaluating the accuracy of radial diaphysis strength predictions with finite element analysis and 2) radii with a locking plate affixed for evaluating metal artifact. All bones were imaged with CT. In the plated group, radii were first imaged with the plates affixed (for simulating digital plate removal). They were then subsequently imaged with the locking plates and screws removed (actual plate removal). Fracture strength of the radius diaphysis under axial compression was predicted with three-dimensional, specimen-specific, nonlinear finite element analysis for both the intact and plated bone (bone with and without the plate captured in the scan). Specimens were then loaded to failure using a universal testing machine to verify actual fracture load. Findings: In the intact group, the physical and predicted fracture loads were strongly correlated. For radii with plates affixed, the physical and predicted (simulated plate removal and actual plate removal) fracture loads were strongly correlated. Interpretation: This study demonstrates that our specimen-specific finite element analysis can accurately predict the strength of the radial diaphysis. The metal artifact from CT imaging was shown to produce an over-estimate of strength. |
| Databáze: | OpenAIRE |
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