Implants with textured surface and methods for producing the same
AssigneeDePuy Products, Inc.
InventorsXiaofan Yang, Panjian Li, Todd Smith
Life of this patent
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Abstract
Compositions and methods are provided for preparing a metal substrate having a uniform textured surface with a plurality of indentations with a diameter in the nanometer and micrometer range. The textured surface is produced by exposing the substrate to an etching fluid comprising a hydrohalic acid and a mixture of a hydrohalic acid and an oxyacid, a chloride containing compound, and an oxidant. The etching solution can be used at ambient temperature. This textured surface enhances adherence of coatings or cells onto the textured surface, improves the retention of proteins on the surface, and encourages bone in-growth.
Claims27
A method of producing a biomedical implant with a textured surface, comprising:
- exposing at least a portion of an implant comprising a chromium containing alloy to an etching fluid, the etching fluid comprising a hydrohalic acid, and an oxidant, the etching fluid being substantially free of methanol;
- and
- incubating the implant with the etching fluid at a temperature range of about 10° C. to about 100° C. until the implant contains a plurality of indentations in the exposed portion of the implant.
A method of producing a biomedical implant with a textured surface, comprising:
- exposing at least a portion of an implant comprising a chromium containing alloy to an etching fluid, the etching fluid being substantially free of methanol, the exposed portion of the implant including a surface comprising metallic elements adhering to the implant;
- and
- incubating the implant with the etching fluid at a temperature range of about 10° C. to about 100° C. until the implant contains a plurality of indentations on the exposed portion of the implant.
Dependencies are inferred from the claim text.