Prosthetic device
AssigneeJointMedica Ltd.
InventorRoger Ashton
Life of this patent
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Abstract
A prosthesis including a UHMWPE core and a coating, wherein the core is a cup-shaped core having a concave first side and a convex second side, wherein the UHMWPE has a weight average molecular weight that is from 2×106 to 3×106 grams per mole. The core has a tensile strength that is from 35 to 50 MPa. The coating layer coats the second side of the core. The coating includes titanium powder having a D50 particle size of from 200 to 250 microns. The coating has a mean thickness that is from 200 to 500 microns. The prosthesis is an acetabular cup prosthesis. When tested for abrasion resistance, the coating loses less than 65 milligrams when abraded for 100 cycles. The coating has a static shear bond strength that is from 15 to 25 MPa and a static tensile bond strength that is from 14 to 25 MPa.
Claims14
A device, comprising:
- a prosthesis core,
- wherein the prosthesis core is a cup-shaped core having a first side and a second side,
- wherein the first side is concave, and
- wherein the second side is convex,
- wherein the prosthesis core comprises ultra-high molecular weight polyethylene,
- wherein the ultra-high molecular weight polyethylene has a weight average molecular weight that is in a range of from 2×106 grams per mole to 3×106 grams per mole, and
- wherein the prosthesis core has a tensile strength that is in a range of from 35 MPa to 50 MPa;
- and
- a coating layer that coats the second side of the prosthesis core,
- wherein the coating layer comprises titanium powder,
- wherein the titanium powder has a D50 particle size that is in a range of from 200 microns to 250 microns,
- wherein the coating layer has a mean thickness that is in a range of from 200 to 500 microns,
- wherein the device is an acetabular cup prosthesis,
- wherein the coating layer has sufficient abrasion resistance such that, when tested for abrasion resistance in accordance with ASTM F1978-22, the coating layer loses less than 65 milligrams when abraded for 100 cycles,
- wherein the coating layer has a static shear bond strength that is in a range of from 15 MPa to 25 MPa, and
- wherein the coating layer has a static tensile bond strength that is in a range of from 14 MPa to 25 MPa.
Dependencies are inferred from the claim text.