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US 9,107,980 B2Granted
Ceramic metal composite for orthopaedic implants
AssigneeSmith & Nephew, Inc.
InventorsShilesh C. Jani, Vivek Devidas Pawar, Carolyn L. Weaver
Life of this patent
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Abstract
The invention relates to an orthopaedic implant made of a ceramic metal composite. The composite includes one phase that is a biocompatible metal or metal alloy and a second phase of ceramic particles examples of which include carbides, nitrides and/or oxides. In some embodiments, the implant comprises a homogeneous ceramic layer as part of a multilayered composition. In some embodiments, the multilayered composition comprises a homogeneous metal layer.
Claims38
A method of making an orthopaedic articulation implant component, comprising:
- mixing powders of ceramic components and metal components to desired ratios to form a first pourable powder;
- mixing powders of ceramic components and metal components to desired ratios to form a second pourable powder, the second pourable powder and the first pourable powder having different ratios of ceramic components and metal components;
- pouring said first pourable powder onto said second pourable powder to create a first layered powder;
- and
- sintering said first layered powder to form a graded composition that is a transition region between an exterior layer of material suitable for bearing articulation and an interior region of the orthopaedic articulation implant component, wherein the concentration of ceramic decreases from the exterior layer to the interior region.
2 more elements
A method of making an orthopaedic articulation implant component, comprising:
- mixing powders of ceramic components and metal components to desired ratios to form a first pourable powder;
- mixing powders of ceramic components and metal components to desired ratios to form a second pourable powder;
- pouring said first pourable powder onto a layer of ceramic powder and pouring said second pourable powder onto said first pourable powder to create a first layered powder and
- sintering said first layered powder to form a graded composition, the graded composition having a ceramic material suitable for bearing articulation at an exterior layer of the graded composition, wherein the concentration of ceramic decreases from the exterior layer of the graded composition to an interior of the graded composition.
1 more element
A method of making an orthopaedic articulation implant component, comprising:
- mixing powders of ceramic components and metal components to desired ratios to form a first powder;
- mixing powders of ceramic components and metal components to desired ratios to form a second powder, the second powder mixture and the first powder mixture having different ratios of ceramic components and metal components;
- pouring said first pourable powder onto said second pourable powder to create a first layered powder;
- and
- sintering said first layered powder to form a graded composition, the graded composition having an exterior layer of material suitable for bearing articulation, wherein the sintered second pourable powder forms the exterior layer, and wherein the concentration of ceramic decreases from the exterior layer to an interior of the graded composition.
2 more elements
A method of making an orthopaedic articulation implant component, comprising:
- mixing powders of ceramic components and metal components to desired ratios to form a first pourable powder;
- mixing powders of ceramic components and metal components to desired ratios to form a second pourable powder, the second pourable powder and the first pourable powder having different ratios of ceramic components and metal components;
- laying said first pourable powder on said second pourable powder to create a first layered powder, wherein laying said first pourable powder on said second pourable powder to create the first layered powder comprises pouring said first pourable powder and said second pourable powder into a mold;
- and
- sintering said first layered powder to form a graded composition that is a transition region between an exterior layer of material suitable for bearing articulation and an interior region of the orthopaedic articulation implant component, wherein the concentration of ceramic decreases from the exterior layer to the interior region.
2 more elements
A method of making an orthopaedic articulation implant component, comprising:
- mixing powders of ceramic components and metal components to desired ratios to form a first pourable powder;
- mixing powders of ceramic components and metal components to desired ratios to form a second pourable powder;
- laying said first pourable powder on a layer of ceramic powder and laying said second pourable powder on said first pourable powder to create a first layered powder, wherein laying said first pourable powder on said second pourable powder to create the first layered powder comprises pouring said first pourable powder and said second pourable powder into a mold;
- and
- sintering said first layered powder to form a graded composition, the graded composition having a ceramic material suitable for bearing articulation at an exterior layer of the graded composition, wherein the concentration of ceramic decreases from the exterior layer of the graded composition to an interior of the graded composition.
2 more elements
A method of making an orthopaedic articulation implant component, comprising:
- mixing powders of ceramic components and metal components to desired ratios to form a first powder;
- mixing powders of ceramic components and metal components to desired ratios to form a second powder, the second powder mixture and the first powder mixture having different ratios of ceramic components and metal components;
- laying said first pourable powder on said second pourable powder to create a first layered powder, wherein laying said first pourable powder on said second pourable powder to create the first layered powder comprises pouring said first pourable powder and said second pourable powder into a mold;
- and
- sintering said first layered powder to form a graded composition, the graded composition having an exterior layer of material suitable for bearing articulation, wherein the sintered second pourable powder forms the exterior layer, and wherein the concentration of ceramic decreases from the exterior layer to an interior of the graded composition.
2 more elements
Dependencies are inferred from the claim text.