Properties and parameters of novel biodegraable metallic alloys
AssigneeUniversity of Pittsburgh—Of the Commonwealth System of Higher Education
InventorPrashant N. KUMTA
Life of this patent
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Abstract
The invention relates to biodegradable, metal alloys, methods for their preparation and applications for their use. The alloys include magnesium and other components, such as, yttrium, calcium, zirconium, and zinc. These elements are alloyed together in specific combinations and amounts in order to achieve an alloy having desired properties and characteristics. In certain embodiments, strontium or cerium may be included as an additive. The resulting alloys are particularly suitable for forming various medical devices for implantation into the body of a patient.
Claims13
A method of preparing a biodegradable medical implant device, comprising:
- preparing a biodegradable metal alloy, comprising:
- melting about 4.0 weight percent of yttrium, from about 0.5-0.6 weight percent of calcium, from about 0.6-1.0 weight percent of zirconium, about 2.0 weight percent of zinc, and a balance of magnesium including impurities, based on the total weight of the composition, to form a melted mixture;
- and
- casting the melted mixture, comprising:
- pouring the melted mixture into a mold;
- and
- allowing the melted mixture to cool and solidify.
-15. (canceled)
A method of preparing a biodegradable medical implant device, comprising:
- preparing a biodegradable metal alloy, comprising:
- melting from about 4.0-4.5 weight percent of zinc, from about 0.3-0.5 weight percent of zirconium, and a balance of magnesium including impurities, based on the total weight of the composition, to form a melted mixture;
- and
- casting the melted mixture, comprising:
- pouring the melted mixture into a mold;
- and
- allowing the melted mixture to cool and solidify.
Dependencies are inferred from the claim text.