Nan Huang,Yongxiang Leng,Ping Yang,Hong Sun,Jin Wang,Junying Chen,Guojiang Wan,Fengjuan Jing,Ansha Zhao,Kaiquin Xiong,Tianxue You
申请号：
US13228353
公开号：
US20130066417A1
申请日:
2011.09.08
申请国别(地区):
US
年份:
2013
代理人:
摘要：
Degradable pure iron stent or iron alloy stent is provided. The stent is made containing 0.01 to 0.5 atom % of La, Ce or Sr. The stent is surface modified using ion implantation or plasma ion implantation to implant oxygen, nitrogen, La, Ce or Sr into the stent surface. The stent may also be manufactured by depositing a thin film of La, Ce, Sr, lanthana, ceria, strontia, iron or iron oxide onto the stent surface. The thickness of the deposited films is from 10 to 1000 nanometers with the grain size from 10 to 200 nanometers. The corrosion resistance of these stents is significantly increased, and the stents have good biocompatibility. The degradation of the stents is controllable. The stents can also provide sufficient support in blood vessel in 3-6 months after intervention and be degraded after 6 months.
