Next Article in Journal
Complications Related to Metal-on-Metal Articulation in Trapeziometacarpal Joint Total Joint Arthroplasty
Next Article in Special Issue
Applications of Shape Memory Alloys for Neurology and Neuromuscular Rehabilitation
Previous Article in Journal
Nanomedicine Approaches for Corneal Diseases
Previous Article in Special Issue
Cleaning Effectiveness of Three NiTi Rotary Instruments: A Focus on Biomaterial Properties
Article Menu

Export Article

Open AccessArticle
J. Funct. Biomater. 2015, 6(2), 299-317; doi:10.3390/jfb6020299

Computational Modeling to Predict Fatigue Behavior of NiTi Stents: What Do We Need?

1
Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering 'Giulio Natta', Politecnico di Milano, Milan 20133, Italy
2
Department of Civil and Environmental Engineering, Politecnico di Milano, Milan 20133, Italy
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Francesco Puoci
Received: 31 March 2015 / Revised: 25 April 2015 / Accepted: 11 May 2015 / Published: 20 May 2015
(This article belongs to the Special Issue Biomedical Applications of Shape Memory Alloys)
View Full-Text   |   Download PDF [2575 KB, uploaded 20 May 2015]   |  

Abstract

NiTi (nickel-titanium) stents are nowadays commonly used for the percutaneous treatment of peripheral arterial disease. However, their effectiveness is still debated in the clinical field. In fact a peculiar cyclic biomechanical environment is created before and after stent implantation, with the risk of device fatigue failure. An accurate study of the device fatigue behavior is of primary importance to ensure a successful stenting procedure. Regulatory authorities recognize the possibility of performing computational analyses instead of experimental tests for the assessment of medical devices. However, confidence in numerical methods is only possible after verification and validation of the models used. For the case of NiTi stents, mechanical properties are strongly dependent on the device dimensions and the whole treatments undergone during manufacturing process. Hence, special attention should be paid to the accuracy of the description of the device geometry and the material properties implementation into the numerical code, as well as to the definition of the fatigue limit. In this paper, a path for setting up an effective numerical model for NiTi stent fatigue assessment is proposed and the results of its application in a specific case study are illustrated. View Full-Text
Keywords: peripheral arterial diseases; shape memory alloys; cardiovascular devices; fatigue failure; finite element analyses peripheral arterial diseases; shape memory alloys; cardiovascular devices; fatigue failure; finite element analyses
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Dordoni, E.; Petrini, L.; Wu, W.; Migliavacca, F.; Dubini, G.; Pennati, G. Computational Modeling to Predict Fatigue Behavior of NiTi Stents: What Do We Need? J. Funct. Biomater. 2015, 6, 299-317.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
J. Funct. Biomater. EISSN 2079-4983 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top