Smart 4D-printed implants and instruments

Selective laser melting (SLM) was used to manufacture smart programmed structures with customized properties made of biocompatible NiTi shape-memory alloy. A series of helixes was produced with systematically varied SLM process parameters Laser Exposure Time and Laser Power in order to specifically...

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Autores principales:	Wild Michael de, Dany Sebastian, John Christoph, Schuler Felix
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2020
Materias:	4d-printing smart tools selective laser melting niti transformation temperature Medicine R
Acceso en línea:	https://doaj.org/article/886c7613c19b4e0c9fe670b34eeb4b40
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id	oai:doaj.org-article:886c7613c19b4e0c9fe670b34eeb4b40
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spelling	oai:doaj.org-article:886c7613c19b4e0c9fe670b34eeb4b402021-12-05T14:10:42ZSmart 4D-printed implants and instruments2364-550410.1515/cdbme-2020-3053https://doaj.org/article/886c7613c19b4e0c9fe670b34eeb4b402020-09-01T00:00:00Zhttps://doi.org/10.1515/cdbme-2020-3053https://doaj.org/toc/2364-5504Selective laser melting (SLM) was used to manufacture smart programmed structures with customized properties made of biocompatible NiTi shape-memory alloy. A series of helixes was produced with systematically varied SLM process parameters Laser Exposure Time and Laser Power in order to specifically change the thermo-mechanical material properties of the 3D-structures. This innovation opens up the possibility to adjust the NiTi phase transformation temperature during the manufacturing process. This controllable property determines which of the two crystallographic phases martensite or austenite is present at a certain operating temperature and allows the mechanical properties to be adjusted: martensitic devices are soft and pseudo-plastic due to the shape-memory effect, whereas austenitic structures are pseudo-elastic. In a further step, the SLM process parameters were locally varied within 4Dprinted twin-helixes. As a result, the phases, respectively the mechanical properties of a single component were adjusted at different locations. The ratio of elastic to plastic deformation and the spring constant of the helix can be locally controlled. This allows, for example, the spatio-temporal programming of 3D-printed surgical instruments or implants that are stimuliresponsive.Wild Michael deDany SebastianJohn ChristophSchuler FelixDe Gruyterarticle4d-printingsmart toolsselective laser meltingnititransformation temperatureMedicineRENCurrent Directions in Biomedical Engineering, Vol 6, Iss 3, Pp 209-212 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	4d-printing smart tools selective laser melting niti transformation temperature Medicine R
spellingShingle	4d-printing smart tools selective laser melting niti transformation temperature Medicine R Wild Michael de Dany Sebastian John Christoph Schuler Felix Smart 4D-printed implants and instruments
description	Selective laser melting (SLM) was used to manufacture smart programmed structures with customized properties made of biocompatible NiTi shape-memory alloy. A series of helixes was produced with systematically varied SLM process parameters Laser Exposure Time and Laser Power in order to specifically change the thermo-mechanical material properties of the 3D-structures. This innovation opens up the possibility to adjust the NiTi phase transformation temperature during the manufacturing process. This controllable property determines which of the two crystallographic phases martensite or austenite is present at a certain operating temperature and allows the mechanical properties to be adjusted: martensitic devices are soft and pseudo-plastic due to the shape-memory effect, whereas austenitic structures are pseudo-elastic. In a further step, the SLM process parameters were locally varied within 4Dprinted twin-helixes. As a result, the phases, respectively the mechanical properties of a single component were adjusted at different locations. The ratio of elastic to plastic deformation and the spring constant of the helix can be locally controlled. This allows, for example, the spatio-temporal programming of 3D-printed surgical instruments or implants that are stimuliresponsive.
format	article
author	Wild Michael de Dany Sebastian John Christoph Schuler Felix
author_facet	Wild Michael de Dany Sebastian John Christoph Schuler Felix
author_sort	Wild Michael de
title	Smart 4D-printed implants and instruments
title_short	Smart 4D-printed implants and instruments
title_full	Smart 4D-printed implants and instruments
title_fullStr	Smart 4D-printed implants and instruments
title_full_unstemmed	Smart 4D-printed implants and instruments
title_sort	smart 4d-printed implants and instruments
publisher	De Gruyter
publishDate	2020
url	https://doaj.org/article/886c7613c19b4e0c9fe670b34eeb4b40
work_keys_str_mv	AT wildmichaelde smart4dprintedimplantsandinstruments AT danysebastian smart4dprintedimplantsandinstruments AT johnchristoph smart4dprintedimplantsandinstruments AT schulerfelix smart4dprintedimplantsandinstruments
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Smart 4D-printed implants and instruments

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