Joint or segmental bone implant for deformity correction
An implant is provided for use in an ankle joint between reconditioned end surfaces established on a distal end of an upper tibia bone and an opposing lower talus bone. The implant comprises a substantially porous rigid component adapted to be anchored against the upper tibia reconditioned end surface and the lower talus reconditioned end surface. The component defining an opening therethrough. An intramedullary nail is configured to pass through the opening in the component when the nail is driven through the talus and into the tibia.
1 . An implant for use in the fusion of a plurality of bones, the implant comprising:
a central portion defined by a plurality of struts, the central portion have a top face and a bottom face opposite from the top face, wherein at least a portion of the top and bottom faces are generally parallel to one another; and
a channel defined by the plurality of struts and extending through the central portion, the channel having terminal ends located along the top and bottom faces, respectively,
wherein the central portion defines a first perimeter wider than the terminal ends of the channel.
2 . The implant according to claim 1 , further comprising a tab integral with and extending from the central portion, the tab having a hole extending therethrough and configured for receiving a fastener for securing the central portion to a bone surface.
3 . The implant according to claim 1 , wherein the struts defining the terminal ends further define a plane and/or respective perimeters of the top and bottom faces of the central portion.
4 . The implant according to claim 2 , wherein the tab extends within a plane transverse to a channel axis defined by the channel.
5 . The implant according to claim 1 , wherein the channel has a cylindrical shape.
6 . The implant according to claim 1 , further comprising an intramedullary nail configured to extend through the channel.
7 . The implant according to claim 6 , wherein the intramedullary nail includes a plurality of holes extending therethrough in a direction transverse to a longitudinal axis of the nail.
8 . The implant according to claim 7 , wherein axes of at least two of the holes extending through the nail are skew.
9 . The implant according to claim 1 , wherein the plurality of struts defines at least three convex shapes forming a first set of outer surfaces of the implant.
10 . The implant according to claim 9 , wherein the implant is configured for use in the fusion of respective reconditioned surfaces established on a distal end of a tibia, a talus, and a calcaneus of an ankle joint, wherein the at least three convex shapes forming the first set of outer surfaces are adapted to be disposed against, so as to interface in a complementary manner with, respective reconditioned bone surfaces established on each of a tibia, a talus, and a calcaneus.
11 . The implant according to claim 1 , wherein the plurality of struts defining the channel form polygonal openings.
12 . The implant according to claim 1 , wherein the central portion defines an outer surface of the implant, and wherein the plurality of struts define an internal web structure extending between the outer surface and the channel.
13 . The implant according to claim 1 , wherein at least one of the terminal ends defines a planar outer surface of the implant.
14 . The implant according to claim 13 , further comprising a planar plate member lying on and along the planar outer surface, wherein the planar plate member includes a plurality of holes configured for receiving a corresponding plurality of fasteners.
15 . The implant according to claim 1 , wherein the plurality of struts form polygonal openings that each define a plane.
16 . The implant according to claim 1 , wherein at least some of the struts are curved struts.
17 . The implant according to claim 16 , wherein the plurality of curved struts are interconnected to form a contour of the central portion.
18 . The implant according to claim 1 , wherein the plurality of struts form a component including the central portion and the channel, the implant further comprising bone graft material coating or received within the component.
19 . An implant for use in the fusion of a plurality of bones, the implant comprising:
central portion defined by a plurality of struts; and
a channel defined by the plurality of struts,
wherein the central portion has terminal ends and an outer perimeter defining a curved surface, the channel extending between the terminal ends, and
wherein the struts defining the terminal ends of the channel further define respective perimeters of terminal ends of the central portion.
20 . The implant of claim 19 , wherein at least one strut of the plurality of structures extends along an entire length of the channel between the terminals ends of the channel.
21 . The implant of claim 19 , wherein the channel is generally parallel to a longitudinal axis of the central portion.