Three-dimensional printed 316L stainless steel cardiovascular stent's electrolytic polishing and its mechanical properties.
10.7507/1001-5515.202211078
- Author:
Zhiang CHEN
1
;
Jingtao MIAO
1
;
Qilong WANG
1
;
Suxia HUANG
1
;
Jingjing CAO
1
;
Hezong LI
1
;
Liguo ZHAO
2
;
Jiangyong YUAN
3
Author Information
1. Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province, Hebei University of Engineering, Handan, Hebei 056038, P. R. China.
2. Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK.
3. Affiliated Hospital of Hebei Engineering University, Handan, Hebei 056001, P. R. China.
- Publication Type:Journal Article
- Keywords:
316L stainless steel;
Balloon expansion;
Electrolytic polishing;
Three-dimensional printing;
Vascular stent
- MeSH:
Humans;
Stainless Steel;
Powders;
Cardiovascular System;
Constriction, Pathologic
- From:
Journal of Biomedical Engineering
2023;40(3):552-558
- CountryChina
- Language:Chinese
-
Abstract:
The interventional therapy of vascular stent implantation is a popular treatment method for cardiovascular stenosis and blockage. However, traditional stent manufacturing methods such as laser cutting are complex and cannot easily manufacture complex structures such as bifurcated stents, while three-dimensional (3D) printing technology provides a new method for manufacturing stents with complex structure and personalized designs. In this paper, a cardiovascular stent was designed, and printed using selective laser melting technology and 316L stainless steel powder of 0-10 µm size. Electrolytic polishing was performed to improve the surface quality of the printed vascular stent, and the expansion behavior of the polished stent was assessed by balloon inflation. The results showed that the newly designed cardiovascular stent could be manufactured by 3D printing technology. Electrolytic polishing removed the attached powder and reduced the surface roughness Ra from 1.36 µm to 0.82 µm. The axial shortening rate of the polished bracket was 4.23% when the outside diameter was expanded from 2.42 mm to 3.63 mm under the pressure of the balloon, and the radial rebound rate was 2.48% after unloading. The radial force of polished stent was 8.32 N. The 3D printed vascular stent can remove the surface powder through electrolytic polishing to improve the surface quality, and show good dilatation performance and radial support performance, which provides a reference for the practical application of 3D printed vascular stent.
