Print Email Facebook Twitter Enhancing flexibility and strength-to-weight ratio of polymeric stents Title Enhancing flexibility and strength-to-weight ratio of polymeric stents: A new variable-thickness design approach Author Khatami, Mohamad (Urmia University) Doniavi, Ali (Urmia University) Abazari, Amir Musa (Urmia University) Fotouhi, M. (TU Delft Materials and Environment) Date 2023 Abstract This paper presents a new design strategy to improve the flexibility and strength-to-weight ratio of polymeric stents. The proposed design introduces a variable-thickness (VT) stent that outperforms conventional polymeric stents with constant thickness (CT). While polymeric stents offer benefits like flexibility and bioabsorption, their mechanical strength is lower compared to metal stents. To address this limitation, thicker polymer stents are used, compromising flexibility and clinical performance. Leveraging advancements in 3D printing, a new design approach is introduced in this study and is manufactured by the Liquid Crystal Display (LCD) 3D printing method and PLA resin. The mechanical performance of CT and VT stents is compared using the Finite Element Method (FEM), validated by experimental tests. Results demonstrate that the VT stent offers significant improvements compared to a CT stent in bending stiffness (over 20%), reduced plastic strain distribution of expansion (over 26%), and increased radial strength (over 10%). This research showcases the potential of the VT stent design to enhance clinical outcomes and patient care. Subject 3D printingFinite element methodFlexibilityStentVariable-thickness To reference this document use: http://resolver.tudelft.nl/uuid:2cd2bccc-7a8f-407b-b95b-263f759862fb DOI https://doi.org/10.1016/j.jmbbm.2023.106262 Embargo date 2024-05-28 ISSN 1751-6161 Source Journal of the Mechanical Behavior of Biomedical Materials, 150 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 Mohamad Khatami, Ali Doniavi, Amir Musa Abazari, M. Fotouhi Files PDF 1_s2.0_S175161612300615X_main.pdf 7.75 MB Close viewer /islandora/object/uuid:2cd2bccc-7a8f-407b-b95b-263f759862fb/datastream/OBJ/view