Paper Title:
Mechanical Behaviours of Coronary Stents
  Abstract

The role of the stents is to prevent restenosis. The rapid growth of stents’ application in the treatment of cardiovascular diseases resulted in the unique development of these implants. This is mainly due to the effective clinical trials, the success of which determined the use of these endoprostheses. In this study the surface properties of the coronary stents were described by using different methods (stereomicroscopy, scanning electron microscopy and energy dispersive analysis) before and after balloon expansion. Furthermore, the most frequent failures caused by the expansion were introduced. For investigating fatigue properties two high cycle fatigue test equipments were used: the first one simulates the bending stress, and the second one simulates the effect of the pulsating mechanical strain. Surface features of the stents were examined after the fatigue tests as well: macroscopic damages were not originated on the stents, and the implants were not broken down. Only small traces of fatigue occurred on the surface, which became rough; and slip lines and grain boundaries were outlined.

  Info
Periodical
Edited by
P. VINCENZINI and R. GIARDINO
Pages
91-96
DOI
10.4028/www.scientific.net/AST.49.91
Citation
G. Ring, E. Bognár, J. Dobránszky, J. Ginsztler, L. Major, "Mechanical Behaviours of Coronary Stents", Advances in Science and Technology, Vol. 49, pp. 91-96, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Wun Chet Davy Cheong, W.Z. Zhuang, Liang Chi Zhang
871
Authors: Hidehiko Kimura, Yuka Kojima, Yoshiaki Akiniwa, Keisuke Tanaka, Takaaki Ishida
Abstract:Electron backscattering diffraction, EBSD, technique as well as atomic force microscopy, AFM, was employed to investigate fatigue damage...
943
Authors: Dong Woo Lee, Seok Swoo Cho, Won Sik Joo
Abstract:A roller mill is composed of several rollers, rotational table liners, hydraulic cylinders and raw materials are ground between the rollers...
457
Authors: Kazuaki Shiozawa, Lian Tao Lu
Abstract:Gigacycle fatigue behavior in high-strength steels tested under rotary bending fatigue was summarized in this paper. Characteristic of the...
65
Authors: Shabnam Hosseini, Mohammad Bagher Limooei
Chapter 1: Metal Materials
Abstract:In this research, fatigue behaviour of Ti-6Al-4V alloy was investigated for smooth and notched specimens with stress concentration...
7