Mechanical Properties of Different Airway Stents

Ratnovsky, Anat; Mell, N; Wald, Shaily; Kramer, Mordechai; Naftali, Sara

doi:10.1007/978-3-319-00846-2_231

Cited by 1 publication

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“…Stents are tube‐like structures that are increasingly being used in interventional cardiology revascularization, with proven symptomatic and prognostic efficacy. Some of the most popular stent materials include nitinol, stainless steel, cobalt‐chromium alloy, and other polymeric alloys . Stents can be broadly classified into self‐expandable stent and balloon‐expandable stent .…”

Section: Introductionmentioning

confidence: 99%

Feasibility of using bulk metallic glass for self-expandable stent applications

Kumar

Jafary-Zadeh

Tavakoli

et al. 2016

J. Biomed. Mater. Res.

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Self-expandable stents are widely used to restore blood flow in a diseased artery segment by keeping the artery open after angioplasty. Despite the prevalent use of conventional crystalline metallic alloys, for example, nitinol, to construct self-expandable stents, new biomaterials such as bulk metallic glasses (BMGs) are being actively pursued to improve stent performance. Here, we conducted a series of analyses including finite element analysis and molecular dynamics simulations to investigate the feasibility of using a prototypical Zr-based BMG for self-expandable stent applications. We model stent crimping of several designs for different percutaneous applications. Our results indicate that BMG-based stents with diamond-shaped crowns suffer from severe localization of plastic deformation and abrupt failure during crimping. As a possible solution, we further illustrate that such abrupt failure could be avoided in BMG-based stents without diamond shape crowns. This work would open a new horizon for a quest toward exploiting superior mechanical and functional properties of metallic glasses to design future stents. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1874-1882, 2017.

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Section: Introductionmentioning

confidence: 99%