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Using 3D finite element models verified the importance of callus material and microstructure in biomechanics restoration during bone defect repair.
- Source :
-
Computer Methods in Biomechanics & Biomedical Engineering . Jan2018, Vol. 21 Issue 1, p83-90. 8p. - Publication Year :
- 2018
-
Abstract
- Background:There is lack of further observations on the microstructure and material property of callus during bone defect healing and the relationships between callus properties and the mechanical strength.Methods:Femur bone defect model was created in rabbits and harvested CT data to reconstruct finite element models at 1 and 2 months. Three types of assumed finite element models were compared to study the callus properties, which assumed the material elastic property as heterogeneous (R-model), homogenous (H-model) or did not change from 1 to 2 months (U-model).Results: The apparent elastic moduli increased at 2 months (from 355.58 ± 132.67 to 1139.30 ± 967.43 MPa) in R-models. But there was no significant difference in apparent elastic moduli between R-models (355.58 ± 132.67 and 1139.30 ± 967.43 MPa) and H-models (344.79 ± 138.73 and 1001.52 ± 692.12 MPa) in 1 and 2 months. A significant difference of apparent elastic moduli was found between the R-model (1139.30 ± 967.43 MPa) and U-model group (207.15 ± 64.60 MPa) in 2 months.Conclusions:This study showed that the callus structure stability remodeled overtime to achieve a more effective structure, while the material quality of callus tissue is a very important factor for callus strength. At the meantime, this study showed an evidence that the material heterogeneity maybe not as important as it is in bone fracture model. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10255842
- Volume :
- 21
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Computer Methods in Biomechanics & Biomedical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 127587087
- Full Text :
- https://doi.org/10.1080/10255842.2018.1425404