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US 11,918,474 B2Granted
Laser-produced porous surface
AssigneeThe University of Liverpool
InventorsEric Jones, Christopher J. Sutcliffe, Robin Stamp
Life of this patent
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Abstract
A method of forming an implant having a porous tissue ingrowth structure and a bearing support structure. The method includes depositing a first layer of a metal powder onto a substrate, scanning a laser beam over the powder so as to sinter the metal powder at predetermined locations, depositing at least one layer of the metal powder onto the first layer and repeating the scanning of the laser beam.
Claims17
An orthopedic implant comprising:
- porous first and second structures separated from each other, at least a portion of either one or both of the first and second structures being defined by tessellated cells, each cell being formed of struts including a first plurality of struts defining a first plane and a second plurality of struts sharing a strut with the first plurality of struts and defining a second plane transverse to the first plane;
- and
- an intermediate structure directly attached to the first and the second structures, the intermediate structure having a different porosity than the first and the second structures.
An orthopedic implant comprising:
- porous metallic first and second structures separated from each other, at least a portion of either one or both of the first and second structures being defined by tessellated cells;
- and
- a solid intermediate structure directly attached to each of the first and the second structures,
- wherein the cells define polygons and
- wherein the first structure has pores with diameters in the range of 80 μm to 800 μm and the second structure has pores with diameters exceeding 800 μm.
2 more elements
Dependencies are inferred from the claim text.