ORTHOPAEDIC IMPLANT WITH POROUS STRUCTURAL MEMBER
An orthopaedic implant includes a first member comprised of a substantially non-porous material, and a second member coupled with the first member. The second member has a first side and an opposing second side, with each of the first side and the second side being external load bearing surfaces. The second member is formed from a substantially porous material with interconnecting pores extending from the first side to the second side.
1 . An orthopaedic implant, comprising:
a first member comprised of a substantially non-porous material; and
a second member coupled with said first member, said second member having a first side and an opposing second side, each of said first side and said second side being external load bearing surfaces, said second member comprised of a substantially porous material with interconnecting pores extending from said first side to said second side.
2 . The orthopaedic implant of claim 1 , wherein said first member surrounds said second member, said first member having a first side which is generally coplanar with said first side of said second member, and a second side which is generally coplanar with said second side of said second member.
3 . The orthopaedic implant of claim 2 , wherein said first member is one of generally annular shaped, kidney shaped, D-shaped, circular shaped, oval shaped, and rectangular shaped.
4 . The orthopaedic implant of claim 1 , wherein said first member is a multi-part member, with the parts being coupled together.
5 . The orthopaedic implant of claim 1 , wherein said second member is comprised of one of a metal, ceramic and a polymer.
6 . The orthopaedic implant of claim 1 , wherein said second member is comprised of a plurality of stacked layers which are bonded together.
7 . The orthopaedic implant of claim 6 , wherein said orthopaedic implant has a longitudinal axis, and said plurality of layers are oriented at a predetermined orientation relative to said longitudinal axis, including a selected one of a perpendicular orientation, a parallel orientation and an acute angular orientation.
8 . The orthopaedic implant of claim 7 , wherein said predetermined orientation is one of constant and varies from one part of said implant to another.
9 . The orthopaedic implant of claim 1 , wherein said first member has an interface feature and said second member has a mating interface feature.
10 . The orthopaedic implant of claim 9 , wherein said interface feature is one of a window, a ledge and a groove.
11 . The orthopaedic implant of claim 1 , wherein said second member carries a therapeutic agent.
12 . The orthopaedic implant of claim 11 , wherein said second member includes a reservoir for the therapeutic agent.
13 . The orthopaedic implant of claim 12 , wherein said reservoir has a refill port.
14 . The orthopaedic implant of claim 1 , wherein said implant has a tapered external profile.
15 . The orthopaedic implant of claim 1 , wherein said second member has a reinforced attachment region for interfacing with a surgical instrument.
16 . The orthopaedic implant of claim 1 , wherein said implant includes at least one radiopaque marker.
17 . An orthopaedic implant, comprising a first member and a second member coupled together, said second member having a first side and an opposing second side, each of said first side and said second side being external load bearing surfaces, said second member comprised of a substantially porous material with interconnecting pores extending from said first side to said second side.
18 . The orthopaedic implant of claim 17 , wherein said first member surrounds said second member, said first member having a first side which is generally coplanar with said first side of said second member, and a second side which is generally coplanar with said second side of said second member.
19 . The orthopaedic implant of claim 17 , wherein said second member is comprised of one of a metal, ceramic and a polymer.
20 . The orthopaedic implant of claim 17 , wherein said second member is comprised of a plurality of stacked layers which are bonded together.
21 . The orthopaedic implant of claim 17 , wherein said first member has an interface feature and said second member has a mating interface feature.
22 . The orthopaedic implant of claim 17 , wherein said second member carries a therapeutic agent.
23 . An orthopaedic implant, comprising a first side and an opposing second side, each of said first side and said second side being external load bearing surfaces, said implant comprised of a substantially porous material with interconnecting pores extending from said first side to said second side.
24 . The orthopaedic implant of claim 23 , wherein said substantially porous material is comprised of one of a metal, ceramic and a polymer.
25 . The orthopaedic implant of claim 23 , wherein said porous material is comprised of a plurality of stacked layers which are bonded together.
26 . The orthopaedic implant of claim 23 , wherein said porous material carries a therapeutic agent.