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1
Content available Vascular stents - materials and manufacturing technologies
Malisz Klaudia, Świeczko-Żurek Beata
Engineering of Biomaterials
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2022
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vol. 25, no. 166
22--28
EN
The objective of this article is to present materials and technology for the manufacture of vascular stents with appropriate design requirements. The use of the right material is very important in implantology. A biomaterial introduced into the circulatory system must be biocompatible and hemocompatible. At the same time, it should not initiate toxic, mutagenic, or immunological reactions. Currently, 316L stainless steel (316L SS), nitinol (Ni-Ti alloy) and cobalt-chromium alloy (Co-Cr) are used as standard stent materials. Additionally, drug-containing coatings are used to provide antithrombotic properties. Nowadays, scientists are trying to create biodegradable stents (BDS) using magnesium (Mg) or zinc (Zn) alloys. Laser methods are generally used to manufacture stents using Nd:YAG lasers with a pulse length in the range of several milliseconds. Material removal is based on the ejection of the melt using a high-pressure gas. The result is remelting and heat-affected zones. Various post-processing procedures are necessary to remove residues, including etching and electropolishing. Minimizing the heat-affected zone could be achieved by using femtosecond lasers. Additionally, immersion of the material in water prevents the deposition of residues on the workpiece. Interesting alternatives used in the manufacture of vascular stents are electrospinning or additive techniques. 3D printing enables obtaining of geometrically complex and personalized implants and reduces the consumption of materials and the production of waste.
2
Content available Polymers in medicine – direction of development
Dworak Andrzej, Utrata-Wesołek Alicja, Otulakowski Łukasz, Kasprów Maciej, Trzebicka Barbara
Polimery
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2019
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T. 64, nr 10
645—655
EN
The paper constitutes a brief and subjective review of polymeric materials in the contemporary health service. The range of applications of polymeric materials is discussed, special att ention being paid to such materials for the development of carriers of pharmaceutically active species, stents and vascular prostheses, amongst them to the application of „smart” materials for these purposes, layers and scaff olds for the growth of organs and tissues, antifouling layers. The authors try to turn the att ention of the reader to the research and intellectual eff orts necessary for the development of polymeric materials for the medicine, and conclude about the growing importance of such studies.
PL
Artykuł stanowi skrótowy, subiektywny przegląd materiałów polimerowych wykorzystywanych we współczesnej ochronie zdrowia. W pracy skupiono się na zastosowaniach materiałów polimerowych do konstrukcji nośników leków, stentów i protez naczyń, w tym także na użyciu polimerowych materiałów „inteligentnych”, implantów ortopedycznych oraz podłoży i rusztowań do hodowli komórek lub tkanek, a także warstw zapobiegających porastaniu wszczepionych konstruktów. Autorzy zwracają uwagę na znaczny wysiłek badawczy i intelektualny, niezbędny w procesie opracowania materiałów polimerowych dla medycyny, i na stale rosnące znaczenie takich badań.
3
Content available Optimization of micro-injection moulding process stability in automatic-cyclic mode conditions during manufacturing bioresorbable vascular stents
Włodarczyk J., Stojko M., Janeczek H., Pastusiak M., Sobota M., Kasperczyk J., Dobrzyński P.
Engineering of Biomaterials
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2018
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Vol. 21, no. 148
32
4
Content available Drug - eluting bioresorbable vascular stents manufactured by microinjection moulding
Dobrzyński P., Sobota M., Włodarczyk J., Stoiko M., Pastusiak M., Kasperczyk J., Milewski K., Krauze A.
Engineering of Biomaterials
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2018
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Vol. 21, no. 148
33
5
Content available Bioresorbable self-expanded vascular stents - the preliminary results
Dobrzynski P., Sobota M., Smola A., Kasperczyk J., Kokot G., Kuś W.
Engineering of Biomaterials
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2016
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Vol. 19, no. 138 spec. iss.
41
6
Content available Odporność korozyjna stentów naczyniowych z biomateriałów metalowych
Walke W., Jurkiewicz W., Paszenda Z., Pochrząst M.
Engineering of Biomaterials
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2008
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Vol. 11, no. 77-80
43--45
7
Content available Badania wstępne nad doborem materiałów biodegradowalnych na stent naczyniowy
Bartkowiak M., Będziński R., Chłopek J., Filipiak J.
Engineering of Biomaterials
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2008
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Vol. 11, no. 77-80
60--62
8
Content available remote Electrochemical behavior of Co-Cr-W-Ni alloy with passive layer
Walke W., Paszenda Z., Tyrlik-Held J.
Advances in Materials Science
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2007
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Vol. 7, nr 2(12)
179-188
EN
In the paper the results of corrosion resistance and chemical composition investigations of passive layer formed on the im-plants surface made of Co-Cr-W-Ni alloy used in interventional cardiology have been presented. Corrosion resistance has been tested in the solution simulating environment of human blood at temperature 37+-1°C. Particularly, the investigations of crevice and pitting corrosion resistance have been realized with taking into account the implantation technique of vascular stents. Chemical composition investigations of the passive layer have been carried out with the use of X-ray Photoelectron Spectroscopy (XPS). The results of preliminary tests pointed out on the usefulness of surface treatment of stents made of Co-Cr-W-Ni alloy.
9
Content available Problemy aplikacyjne stentów naczyniowych
Kaczmarek M., Tyrlik-Held J., Marciniak J.
Inżynieria Biomateriałów
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2003
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R. 6, nr 30-33
38-40
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