Surface finishing of biodegradable stents

被引：9

作者：

Yamaguchi, Hitomi ^{[1
]}

Li, Mingshuo ^{[1
]}

Hanada, Kotaro ^{[2
]}

机构：

[1] Univ Florida, Dept Mech & Aerosp Engn, 226 MAE B, Gainesville, FL 32611 USA

[2] Natl Inst Adv Ind Sci & Technol, Adv Mfg Res Inst, 1-2-1 Namiki, Tsukuba, Ibaraki, Japan

来源：

CIRP ANNALS-MANUFACTURING TECHNOLOGY | 2019年 / 68卷 / 01期

关键词：

Polishing; Roughness; Surface integrity; MAGNESIUM ALLOYS; PERFORMANCE;

D O I：

10.1016/j.cirp.2019.04.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The surface conditions of stents influence their polymer/drug coatability, rate of degradation, and ultimately their mechanical strength, ability to expand, and service lifetime. This paper describes new polishing tools developed to mechanically polish entire biodegradable magnesium-alloy stents. Use of the new tools removes material from the peaks of the stent surfaces and enables surface smoothing equivalent to electrolytic polishing (EP) but with less material removal, helping extend the stent service life. Static immersion tests using Dulbecco's modification of Eagle medium solution demonstrated that stents polished using the new tools had a rate of degradation about 40% lower than EP-processed stents. (C) 2019 Published by Elsevier Ltd on behalf of CIRP.

引用

页码：357 / 360

页数：4

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