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dc.contributor.author
Lewin, Susanne
dc.contributor.author
Fleps, Ingmar
dc.contributor.author
Åberg, Jonas
dc.contributor.author
Ferguson, Stephen J.
dc.contributor.author
Engqvist, Håkan
dc.contributor.author
Öhman-Mägi, Caroline
dc.contributor.author
Helgason, Benedikt
dc.contributor.author
Persson, Cecilia
dc.date.accessioned
2020-11-04T10:47:53Z
dc.date.available
2020-11-03T03:59:18Z
dc.date.available
2020-11-04T10:47:53Z
dc.date.issued
2021-01-01
dc.identifier.issn
0264-1275
dc.identifier.issn
1873-4197
dc.identifier.other
10.1016/j.matdes.2020.109207
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/449380
dc.identifier.doi
10.3929/ethz-b-000449380
dc.description.abstract
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.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Additive manufacturing
en_US
dc.subject
Electron beam melting
en_US
dc.subject
Powder bed fusion
en_US
dc.subject
Finite element models
en_US
dc.subject
Surface roughness
en_US
dc.subject
Cranial implant
en_US
dc.title
Additively manufactured mesh-type titanium structures for cranial implants: E-PBF vs. L-PBF
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
220-10-06
ethz.journal.title
Materials & Design
ethz.journal.volume
197
en_US
ethz.journal.abbreviated
Mater. des.
ethz.pages.start
109207
en_US
ethz.size
11 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02070 - Dep. Gesundheitswiss. und Technologie / Dep. of Health Sciences and Technology::02518 - Institut für Biomechanik / Institute for Biomechanics::03915 - Ferguson, Stephen / Ferguson, Stephen
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02070 - Dep. Gesundheitswiss. und Technologie / Dep. of Health Sciences and Technology::02518 - Institut für Biomechanik / Institute for Biomechanics::03915 - Ferguson, Stephen / Ferguson, Stephen
ethz.date.deposited
2020-11-03T03:59:32Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-11-04T10:48:08Z
ethz.rosetta.lastUpdated
2021-02-15T19:43:53Z
ethz.rosetta.versionExported
true
ethz.COinS
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