Bone implant with struts
An implant includes a component for fixed attachment to a bone. An underpass layer of a porous material is disposed on a first side of the component for fixed attachment. At least one strut is provided on the underpass layer. The at least one strut has a first surface contacting the underpass layer and a second surface opposite the first surface. The at least one strut comprises a non-porous material. An additional layer of the porous material fills a respective volume adjacent the at least one strut. The additional layer extends from a first side of the underpass layer to a predetermined height at or above the second surface of the at least one strut.
1. An implant comprising:
a component for fixed attachment to a bone;
an underpass layer of a porous material disposed on a first side of the component for fixed attachment;
at least one strut on the underpass layer, the at least one strut having a first surface contacting the underpass layer and a second surface opposite the first surface, the at least one strut comprising a non-porous material; and
an additional layer of the porous material filling a respective volume adjacent the at least one strut, the additional layer extending from a first side of the underpass layer to a predetermined height equal to or above a height of the second surface of the at least one strut.
2. The implant of claim 1 , wherein:
the component for fixed attachment is a tibial tray,
the implant further comprises a tibial insert having an articulating surface.
3. The implant of claim 1 , wherein:
the component for fixed attachment is a talar plate, and
the implant further comprises a removable talar dome having an articulating surface.
4. The implant of claim 3 , wherein the talar dome has a sulcus, and the at least one strut is located adjacent to the sulcus.
5. An implant comprising:
a tibial ankle component shaped to hold a tibial insert having an articulating surface;
an underpass layer of a porous material disposed on a superior side of the tibial component;
one or more struts on the underpass layer, each of the one or more struts having an inferior surface contacting the underpass layer and a superior surface opposite the inferior surface, each of the one or more struts comprising a non-porous material; and
an additional layer of the porous material filling a respective volume between each adjacent pair of struts in the one or more struts, the additional layer extending from a superior side of the underpass layer to a predetermined height at or above the superior surfaces of the one or more struts.
6. The implant of claim 5 , wherein the porous material and the non-porous material have a same composition.
7. The implant of claim 5 , wherein the tibial component has a length and each of the plurality of struts has a respective length less than the length of the tibial component.
8. The implant of claim 5 , further comprising at least one peg extending in a superior direction from a respective one of the plurality of struts, the peg having a non-porous interior and a porous exterior surface.
9. The implant of claim 5 , wherein the plurality of struts have an undulating configuration.
10. The implant of claim 5 , wherein the plurality of struts have a cross-section that is wider at the inferior surface of each strut than at the superior surface of each strut.
11. The implant of claim 5 , wherein a thickness of the underpass layer is greater than a distance between the superior surface of each of the one or more struts and a superior surface of the additional layer.
12. The implant of claim 5 , wherein the superior surface of the additional layer covers the entire superior side of the tibial component.
13. The implant of claim 5 , wherein the porous material in the underpass layer is shaped into at least one strip extending perpendicular to a longitudinal direction of the one or more struts.
14. The implant of claim 5 , wherein the at least one strip extends beneath all of the one or more struts.
15. The implant of claim 5 , wherein the underpass layer comprises a resorbable material.
16. The implant of claim 5 , wherein the underpass layer comprises a biologic material.
17. An implant comprising:
a component for fixed attachment to a bone;
an underpass layer of a porous material disposed on a first side of the component for fixed attachment;
at least one strut on the underpass layer, the at least one strut having a first surface contacting the underpass layer and a second surface opposite the first surface, the at least one strut comprising a non-porous material, wherein the porous material in the underpass layer is shaped into at least one strip extending perpendicular to a longitudinal direction of the plurality of one or more struts; and
an additional layer of the porous material filling a respective volume adjacent the at least one strut, the additional layer extending from a first side of the underpass layer to a predetermined height equal to or above a height of the second surface of the at least one strut.