The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures
Synthetic bone models are used to train surgeons as well as to test new medical devices. However, currently available models do not accurately mimic the complex structure of trabecular bone, which can provide erroneous results. This study aimed to investigate the suitability of stereolithography (SL...
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MDPI AG
2021-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/13/3712 |
| _version_ | 1797527939117481984 |
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| author | Ana Grzeszczak Susanne Lewin Olle Eriksson Johan Kreuger Cecilia Persson |
| author_facet | Ana Grzeszczak Susanne Lewin Olle Eriksson Johan Kreuger Cecilia Persson |
| author_sort | Ana Grzeszczak |
| collection | DOAJ |
| description | Synthetic bone models are used to train surgeons as well as to test new medical devices. However, currently available models do not accurately mimic the complex structure of trabecular bone, which can provide erroneous results. This study aimed to investigate the suitability of stereolithography (SLA) to produce synthetic trabecular bone. Samples were printed based on synchrotron micro-computed tomography (micro-CT) images of human bone, with scaling factors from 1 to 4.3. Structure replicability was assessed with micro-CT, and mechanical properties were evaluated by compression and screw pull-out tests. The overall geometry was well-replicated at scale 1.8, with a volume difference to the original model of <10%. However, scaling factors below 1.8 gave major print artefacts, and a low accuracy in trabecular thickness distribution. A comparison of the model–print overlap showed printing inaccuracies of ~20% for the 1.8 scale, visible as a loss of smaller details. SLA-printed parts exhibited a higher pull-out strength compared to existing synthetic models (Sawbones ™), and a lower strength compared to cadaveric specimens and fused deposition modelling (FDM)-printed parts in poly (lactic acid). In conclusion, for the same 3D model, SLA enabled higher resolution and printing of smaller scales compared to results reported by FDM. |
| first_indexed | 2024-03-10T09:50:58Z |
| format | Article |
| id | doaj.art-9823e93f4fdc4ac4b18e0b95f6199827 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:50:58Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9823e93f4fdc4ac4b18e0b95f61998272023-11-22T02:44:43ZengMDPI AGMaterials1996-19442021-07-011413371210.3390/ma14133712The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone StructuresAna Grzeszczak0Susanne Lewin1Olle Eriksson2Johan Kreuger3Cecilia Persson4Department of Materials Science and Engineering, Uppsala University, 751 21 Uppsala, SwedenDepartment of Materials Science and Engineering, Uppsala University, 751 21 Uppsala, SwedenDepartment of Medical Cell Biology, Uppsala University, 751 23 Uppsala, SwedenDepartment of Medical Cell Biology, Uppsala University, 751 23 Uppsala, SwedenDepartment of Materials Science and Engineering, Uppsala University, 751 21 Uppsala, SwedenSynthetic bone models are used to train surgeons as well as to test new medical devices. However, currently available models do not accurately mimic the complex structure of trabecular bone, which can provide erroneous results. This study aimed to investigate the suitability of stereolithography (SLA) to produce synthetic trabecular bone. Samples were printed based on synchrotron micro-computed tomography (micro-CT) images of human bone, with scaling factors from 1 to 4.3. Structure replicability was assessed with micro-CT, and mechanical properties were evaluated by compression and screw pull-out tests. The overall geometry was well-replicated at scale 1.8, with a volume difference to the original model of <10%. However, scaling factors below 1.8 gave major print artefacts, and a low accuracy in trabecular thickness distribution. A comparison of the model–print overlap showed printing inaccuracies of ~20% for the 1.8 scale, visible as a loss of smaller details. SLA-printed parts exhibited a higher pull-out strength compared to existing synthetic models (Sawbones ™), and a lower strength compared to cadaveric specimens and fused deposition modelling (FDM)-printed parts in poly (lactic acid). In conclusion, for the same 3D model, SLA enabled higher resolution and printing of smaller scales compared to results reported by FDM.https://www.mdpi.com/1996-1944/14/13/3712stereolithographytrabecular boneadditive manufacturing3D printingmechanical properties |
| spellingShingle | Ana Grzeszczak Susanne Lewin Olle Eriksson Johan Kreuger Cecilia Persson The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures Materials stereolithography trabecular bone additive manufacturing 3D printing mechanical properties |
| title | The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures |
| title_full | The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures |
| title_fullStr | The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures |
| title_full_unstemmed | The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures |
| title_short | The Potential of Stereolithography for 3D Printing of Synthetic Trabecular Bone Structures |
| title_sort | potential of stereolithography for 3d printing of synthetic trabecular bone structures |
| topic | stereolithography trabecular bone additive manufacturing 3D printing mechanical properties |
| url | https://www.mdpi.com/1996-1944/14/13/3712 |
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