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US 8,998,978 B2Granted
Stent formed from bioerodible metal-bioceramic composite
AssigneeAbbott Cardiovascular Systems Inc.
InventorYunbing Wang
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Abstract
Medical devices and methods of fabricating such medical devices, such as stents, formed at least in part from a metal matrix composite including bioceramic particles dispersed within an erodible metal are disclosed.
Claims6
A stent comprising a stent body consisting of a metal matrix composite, the composite including biodegradable bioceramic nanoparticles dispersed within and throughout a bioerodible metal matrix, wherein the bioceramic nanoparticles are spherical and have a diameter from 1 nm to 100 nm,
- wherein the biodegradable bioceramic nanoparticles that are dispersed modify the erosion rate of the stent body in a vascular environment and enhance mechanical properties of the stent body,
- wherein enhance the mechanical properties comprises an increase in tensile strength and an increase in fracture toughness,
- wherein erosion of the nanoparticles decreases the erosion rate of the metal,
- wherein the stent body is a scaffolding composed of a plurality of structural elements made from the composite, and
- wherein the bioceramic nano-particles are dispersed with high uniformity throughout the stent body and the bioceramic nanoparticles are dispersed throughout the scaffolding.
2 more elements
Dependencies are inferred from the claim text.