Patent ID: 7625406
Filing Date: 2009-12-01
Classification: A61B,A61F

Abstract:
1. A prosthetic joint kit comprising: a first stem structure having a first end adapted to fit within a medullary canal of a first bone; a first bearing component coupled to the first stem structure, the first bearing component having first and second condyle portions, each of the first and second condyle portions being at least partially spherically shaped; a second stem structure having a second end that is adapted to fit within a medullary canal of a second bone; and a plurality of second bearing components, each of the second bearing components being configured to be interchangeably coupled to the second stem structure, each of the second bearing components having a bearing surface that is configured to engage the first and second condyle portions, each of the bearing surfaces of the plurality of second bearing components being configured differently from the bearing surfaces of a remaining quantity of the second bearing components, each of the bearing surfaces providing a varying degree of constraint between the first and second stem structures as the first and second stem structures are rotated relative to one another; wherein each of the plurality of second bearing components defines a first bearing face opposed to a second bearing face, the first condyle portion bears on the first bearing face and the second condyle portion bears on the second bearing face, the first condyle portion and the second condyle portion are both exterior to the second bearing component, the first bearing face defines both a first bearing surface and a second bearing surface and the second bearing face defines both a third bearing surface and a fourth bearing surface, the first bearing surface and the second bearing surface are defined around respective first and second center axes, the first center axis is formed at an angle relative to the second center axis; and wherein each of the second bearing components includes a different angle between the first and second center axes to provide the varying degree of constraint among the plurality of second bearing components.