Biomechanical validation of additively manufactured artificial femoral bones
Abstract Replicating the mechanical behavior of human bones, especially cancellous bone tissue, is challenging. Typically, conventional bone models primarily consist of polyurethane foam surrounded by a solid shell. Although nearly isotropic foam components have mechanical properties similar to canc...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2022-08-01
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| Series: | BMC Biomedical Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s42490-022-00063-1 |
| _version_ | 1811345175876730880 |
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| author | F. Metzner C. Neupetsch A. Carabello M. Pietsch T. Wendler W.-G. Drossel |
| author_facet | F. Metzner C. Neupetsch A. Carabello M. Pietsch T. Wendler W.-G. Drossel |
| author_sort | F. Metzner |
| collection | DOAJ |
| description | Abstract Replicating the mechanical behavior of human bones, especially cancellous bone tissue, is challenging. Typically, conventional bone models primarily consist of polyurethane foam surrounded by a solid shell. Although nearly isotropic foam components have mechanical properties similar to cancellous bone, they do not represent the anisotropy and inhomogeneity of bone architecture. To consider the architecture of bone, models were developed whose core was additively manufactured based on CT data. This core was subsequently coated with glass fiber composite. Specimens consisting of a gyroid-structure were fabricated using fused filament fabrication (FFF) techniques from different materials and various filler levels. Subsequent compression tests showed good accordance between the mechanical behavior of the printed specimens and human bone. The unidirectional fiberglass composite showed higher strength and stiffness than human cortical bone in 3-point bending tests, with comparable material behaviors being observed. During biomechanical investigation of the entire assembly, femoral prosthetic stems were inserted into both artificial and human bones under controlled conditions, while recording occurring forces and strains. All of the artificial prototypes, made of different materials, showed analogous behavior to human bone. In conclusion, it was shown that low-cost FFF technique can be used to generate valid bone models and selectively modify their properties by changing the infill. |
| first_indexed | 2024-04-13T19:59:04Z |
| format | Article |
| id | doaj.art-7166ab63c3ab4d5b9d5730415b7277b7 |
| institution | Directory Open Access Journal |
| issn | 2524-4426 |
| language | English |
| last_indexed | 2024-04-13T19:59:04Z |
| publishDate | 2022-08-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Biomedical Engineering |
| spelling | doaj.art-7166ab63c3ab4d5b9d5730415b7277b72022-12-22T02:32:14ZengBMCBMC Biomedical Engineering2524-44262022-08-014111210.1186/s42490-022-00063-1Biomechanical validation of additively manufactured artificial femoral bonesF. Metzner0C. Neupetsch1A. Carabello2M. Pietsch3T. Wendler4W.-G. Drossel5ZESBO Centre for Research on Musculoskeletal Systems, Leipzig UniversityDepartment of Orthopaedics, Trauma and Plastic Surgery, Leipzig UniversityFraunhofer Institute for Machine Tools and Forming TechnologyFraunhofer Institute for Machine Tools and Forming TechnologyZESBO Centre for Research on Musculoskeletal Systems, Leipzig UniversityFraunhofer Institute for Machine Tools and Forming TechnologyAbstract Replicating the mechanical behavior of human bones, especially cancellous bone tissue, is challenging. Typically, conventional bone models primarily consist of polyurethane foam surrounded by a solid shell. Although nearly isotropic foam components have mechanical properties similar to cancellous bone, they do not represent the anisotropy and inhomogeneity of bone architecture. To consider the architecture of bone, models were developed whose core was additively manufactured based on CT data. This core was subsequently coated with glass fiber composite. Specimens consisting of a gyroid-structure were fabricated using fused filament fabrication (FFF) techniques from different materials and various filler levels. Subsequent compression tests showed good accordance between the mechanical behavior of the printed specimens and human bone. The unidirectional fiberglass composite showed higher strength and stiffness than human cortical bone in 3-point bending tests, with comparable material behaviors being observed. During biomechanical investigation of the entire assembly, femoral prosthetic stems were inserted into both artificial and human bones under controlled conditions, while recording occurring forces and strains. All of the artificial prototypes, made of different materials, showed analogous behavior to human bone. In conclusion, it was shown that low-cost FFF technique can be used to generate valid bone models and selectively modify their properties by changing the infill.https://doi.org/10.1186/s42490-022-00063-1Artificial boneAdditive manufacturingFemoralBone model3D-printingFemur |
| spellingShingle | F. Metzner C. Neupetsch A. Carabello M. Pietsch T. Wendler W.-G. Drossel Biomechanical validation of additively manufactured artificial femoral bones BMC Biomedical Engineering Artificial bone Additive manufacturing Femoral Bone model 3D-printing Femur |
| title | Biomechanical validation of additively manufactured artificial femoral bones |
| title_full | Biomechanical validation of additively manufactured artificial femoral bones |
| title_fullStr | Biomechanical validation of additively manufactured artificial femoral bones |
| title_full_unstemmed | Biomechanical validation of additively manufactured artificial femoral bones |
| title_short | Biomechanical validation of additively manufactured artificial femoral bones |
| title_sort | biomechanical validation of additively manufactured artificial femoral bones |
| topic | Artificial bone Additive manufacturing Femoral Bone model 3D-printing Femur |
| url | https://doi.org/10.1186/s42490-022-00063-1 |
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