Finite element analysis of the femoral diaphysis of fresh-frozen cadavers with computed tomography and mechanical testing
| Autor: | Kensuke Yoshino, Masahiko Sugano, Michiaki Miura, Seiji Ohtori, Yusuke Matsuura, Kazuhide Inage, Kento Nawata, Yuya Kawarai, Junichi Nakamura, Takane Suzuki, Yasushi Wako, Sumihisa Orita, Shigeo Hagiwara |
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| Rok vydání: | 2018 |
| Předmět: |
Male
The femoral diaphysis fracture lcsh:Diseases of the musculoskeletal system Compressive Strength Shell (structure) Bending Fresh frozen cadaver 03 medical and health sciences 0302 clinical medicine lcsh:Orthopedic surgery Cadaver Humans Medicine Orthopedics and Sports Medicine Femur Computed tomography Aged Aged 80 and over Orthodontics 030222 orthopedics business.industry Finite element analysis Validation study Stiffness Femoral fracture musculoskeletal system medicine.disease Finite element method Biomechanical Phenomena Vertebra lcsh:RD701-811 medicine.anatomical_structure Female Surgery Diaphyses lcsh:RC925-935 medicine.symptom Tomography X-Ray Computed business Cadaveric spasm 030217 neurology & neurosurgery Research Article |
| Zdroj: | Journal of Orthopaedic Surgery and Research, Vol 13, Iss 1, Pp 1-8 (2018) Journal of Orthopaedic Surgery and Research |
| ISSN: | 1749-799X |
| DOI: | 10.1186/s13018-018-0898-7 |
| Popis: | Background The purpose of this study was to validate a diaphyseal femoral fracture model using a finite element analysis (FEA) with mechanical testing in fresh-frozen cadavers. Methods We used 18 intact femora (9 right and 9 left) from 9 fresh-frozen cadavers. Specimens were obtained from 5 males and 4 females with a mean age of 85.6 years. We compared a computed tomography (CT)-based FEA model to diaphyseal femoral fracture loads and stiffness obtained by three-point bending. Four material characteristic conversion equations (the Keyak, Carter, and Keller equations plus Keller’s equation for the vertebra) with different shell thicknesses (0.3, 0.4, and 0.5 mm) were compared with the mechanical testing. Results The average fracture load was 4582.8 N and the mean stiffness was 942.0 N/mm from actual mechanical testing. FEA prediction using Keller’s equation for the vertebra with a 0.4-mm shell thickness showed the best correlations with the fracture load (R 2 = 0.76) and stiffness (R 2 = 0.54). Shell thicknesses of 0.3 and 0.5 mm in Keller’s equation for the vertebra also showed a strong correlation with fracture load (R 2 = 0.66 for both) and stiffness (R 2 = 0.50 and 0.52, respectively). There were no significant correlations with the other equations. Conclusion We validated femoral diaphyseal fracture loads and stiffness using an FEA in a cadaveric study. |
| Databáze: | OpenAIRE |
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