Porous surface layers with increased surface roughness and implants incorporating the same
AssigneeSmith & Nephew, Inc.
InventorsCarie Fincher Alley, Laura J. Gilmour
Life of this patent
Estimating the term…
Abstract
Systems and methods for providing tissue-interfacing surface layers with increased roughness can be attained by providing a metallic powder to a machined or previously machined tissue-interfacing surface of a porous foam structure. The metallic powder can have sizes and characteristics such that the porous structure can have an increased roughness at the tissue-interfacing machined surface while inhibiting the occlusion of the open pores in the porous metallic foam structure.
Claims20
A method for increasing the surface roughness of a porous structure, comprising:
- machining a porous structure to a desired shape, the porous structure having a machined tissue-interfacing outer surface having a pore size;
- bonding a powder to the machined tissue-interfacing outer surface of the machined porous structure, the powder comprising asymmetric powder particles;
- and
- substantially retaining, upon bonding of the powder, the pore size of the machined tissue-interfacing outer surface,
- wherein the asymmetric powder particles are sized to increase the roughness of the machined tissue-interfacing outer surface of the machined porous structure while preventing the occlusion of the pores of the porous structure.
A method for increasing the surface roughness of a porous structure, comprising:
- machining a porous structure to a desired shape;
- bonding a powder to a machined tissue-interfacing outer surface of the machined porous structure, the powder comprising asymmetric powder particles;
- and
- applying one or more additional layers of powder to all surfaces of the porous structure, the one or more additional layers each comprising a fine spherical powder comprised of particles sized not greater than 45 micrometers,
- wherein the asymmetric powder particles are sized to increase the roughness of the machined tissue-interfacing outer surface of the machined porous structure while preventing the occlusion of the pores of the porous structure.
A method for increasing the surface roughness of a porous structure having a machined tissue-interfacing outer surface and one or more additional surfaces, comprising:
- applying to the machined tissue-interfacing outer surface a plurality of powder particles having a particle size for maintaining a pore size of the machined tissue-interfacing outer surface;
- bonding the plurality of powder particles to at least a portion of the machined tissue-interfacing outer surface of the machined porous structure;
- maintaining, upon bonding of the plurality of powder particles, approximately the pore size of the machined tissue-interfacing outer surface,
- wherein at least a portion of the plurality of powder particles has sufficient dimensions to increase the roughness of the machined tissue-interfacing outer surface of the machined porous structure without occluding a plurality of pores of the porous structure.
Dependencies are inferred from the claim text.