Prosthetic devices having diffusion-hardened surfaces and bioceramic coatings
First Claim
Patent Images
1. A prosthesis comprising:
- (a) a femoral component having (1) an implant portion for inserting into body tissue;
(2) a bearing surface comprising at least one condyle;
said femoral component formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
(b) a tibial component having an articulating surface, said articulating surface comprised of an organic polymer or polymer-based composite and adapted to cooperate with said bearing surface;
(c) a diffusion-hardened oxide or nitride coating on at least a part of said bearing surface for reducing wear of the tibial component; and
, (d) a coating of at least one bioceramic compound on at least a part of said implant portion.
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Abstract
A prosthetic device having at least part of its surface comprising a diffusion-hardened, in-situ formed oxidation or nitridation layer and with at least another part of its surface comprising a coating of bioceramic, preferably hydroxyapatite. The bone in-growth and on-growth promoting bioceramic further works synergistically with the diffusion-hardened surface in realizing a longer service life prosthetic.
116 Citations
59 Claims
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1. A prosthesis comprising:
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(a) a femoral component having (1) an implant portion for inserting into body tissue;
(2) a bearing surface comprising at least one condyle;
said femoral component formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
(b) a tibial component having an articulating surface, said articulating surface comprised of an organic polymer or polymer-based composite and adapted to cooperate with said bearing surface;
(c) a diffusion-hardened oxide or nitride coating on at least a part of said bearing surface for reducing wear of the tibial component; and
,(d) a coating of at least one bioceramic compound on at least a part of said implant portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A prosthesis comprising:
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(a) a femoral component having (1) an implant portion for inserting into body tissue;
(2) a head portion comprising a bearing surface;
said femoral component formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
(b) an acetabular cup having an inner surface comprising an organic polymer or a polymer-based composite and an outer surface, said inner surface being adapted to cooperate with said bearing surface;
(c) a diffusion-hardened oxide or nitride coating on at least a part of said bearing surface for reducing wear of said inner surface; and
,(d) a coating of at least one bioceramic compound on at least a part of;
(1) said implant portion;
(2) said outer surface;
or,(3) both said implant portion and said outer surface. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A prosthesis comprising:
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(a) a body having an implant portion for inserting into body tissue, said body formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
(b) a bearing surface on said body, said bearing surface being sized and shaped to engage or cooperate with a second bearing surface, said second bearing surface being a part of another prosthesis portion;
(c) a diffusion-hardened oxide or nitride coating on said bearing surface of said body;
(d) a coating of at least one bioceramic compound on at least a part of said body. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 34)
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- 32. The prosthesis of claim 32 wherein said coating of at least one bioceramic compound on said another prosthesis portion comprises a compound selected from the group consisting of hydroxyapatite, fluoroapatite, chloroapatite, bromoapatite, and iodoapatite, calcium sulfate, calcium phosphate, calcium carbonate, calcium tartarate, bioactive glass, and combinations thereof.
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35. A prosthesis comprising:
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(a) a body having an implant portion for inserting into the body tissue of a patient, said body formed of zirconium, hafnium, niobium, tantalum or alloys thereof, (b) a bearing surface on said body;
(c) a counter bearing surface adapted to cooperate with the bearing surface;
(c) a diffusion-hardened oxide or nitride coating at least a part of said bearing surface; and
,(d) a coating of at least one bioceramic compound on at least a part of said implant portion. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A prosthesis comprising:
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(a) a prosthesis body formed of zirconium, hafnium, niobium, tantalum or alloys thereof, the prosthesis body forming one component of a two-component joint and having a bearing surface at least a portion of which is adapted to cooperate with and slide against body tissue of a second joint component;
(b) a diffusion-hardened oxide or nitride coating on at least a part of a bearing surface adapted to cooperate and slide against the body tissue, said coating selected from the group consisting of oxidized zirconium, oxidized hafnium, oxidized niobium, oxidized tantalum, nitrided zirconium, nitrided hafnium, nitrided niobium, nitrided tantalum and combinations thereof; and
,(c) a coating of at least one bioceramic compound on at least a part of said prosthesis body. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57)
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58. A prosthesis comprising:
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(a) a body formed of alloy having a composition comprising from about 10 to about 20 wt % niobium or from about 35 to about 50 wt % niobium;
from about 13 to about 20 wt % zirconium; and
the balance titanium;
(b) a diffusion-hardened oxide or nitride coating on at least a part of said body; and
,(c) a coating of at least one bioceramic compound on at least a part of said body. - View Dependent Claims (59)
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Specification