Additively manufactured mesh-type titanium structures for cranial implants: E-PBF vs. L-PBF Article Swipe
Susanne Lewin
,
Ingmar Fleps
,
Jonas Åberg
,
Stephen J. Ferguson
,
Håkan Engqvist
,
Caroline Öhman‐Mägi
,
Benedikt Helgason
,
Cecilia Persson
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.3929/ethz-b-000449380
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.3929/ethz-b-000449380
A patient-specific titanium-reinforced calcium phosphate (CaP–Ti) cranial implant has recently shown promising clinical results. Currently, its mesh-type titanium structure is additively manufactured using laser beam powder bed fusion (L-PBF). Nevertheless, an electron-beam (E-PBF) process could potentially be more time efficient. This study aimed to compare the geometrical accuracy and mechanical response of thin titanium structures manufactured by L-PBF (HIPed) and E-PBF (as-printed). Tensile test (ø = 1.2 mm) and implant specimens were manufactured. Measurements by μCT revealed a deviation in cross-sectional area as compared to the designed geometry: 13–35% for E-PBF and below 2% for L-PBF. A superior mechanical strength was obtained for the L-PBF specimens, both in the tensile test and the implant compression tests. The global peak load in the implant test was 457 ± 9 N and 846 ± 40 N for E-PBF and L-PBF, respectively. Numerical simulations demonstrated that geometrical deviation was the main factor in implant performance and enabled quantification of this effect: 34–39% reduction in initial peak force based on geometry, and only 11–16% reduction based on the material input. In summary, the study reveals an uncertainty in accuracy when structures of sizes relevant to mesh-type cranial implants are printed by the E-PBF method.
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- Type
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- Language
- en
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https://doi.org/10.3929/ethz-b-000449380Digital Object Identifier
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Additively manufactured mesh-type titanium structures for cranial implants: E-PBF vs. L-PBFWork title
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articleOpenAlex work type
- Language
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enPrimary language
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2021Year of publication
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2021-01-01Full publication date if available
- Authors
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Susanne Lewin, Ingmar Fleps, Jonas Åberg, Stephen J. Ferguson, Håkan Engqvist, Caroline Öhman‐Mägi, Benedikt Helgason, Cecilia PerssonList of authors in order
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https://hdl.handle.net/20.500.11850/449380Publisher landing page
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
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https://hdl.handle.net/20.500.11850/449380Direct OA link when available
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Materials science, Implant, Titanium, Ultimate tensile strength, Compression (physics), Biomedical engineering, Reduction (mathematics), Composite material, Geometry, Mathematics, Surgery, Medicine, MetallurgyTop concepts (fields/topics) attached by OpenAlex
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