Porous titanium tibial sleeves and their use in revision knee surgery
View Patent ↗The invention concerns monolithic foam sleeves that comprises titanium or titanium alloy foam having a porosity of 50 to 85% and possesses a proximal surface, a distal end, an interior wall that defines an interior channel and extends from the proximal surface to the distal end; and a terraced outer surface that tapers such that said sleeve is widest at the proximal surface and most narrow at the distal end.
1. A tibial implant comprising:
a monolithic foam sleeve suitable for use in revision knee surgery,
said sleeve composed of that comprises titanium or titanium alloy foam having a porosity of 50 to 85% and possesses
a proximal surface,
a distal end,
an interior wall that defines an interior channel and extends from the proximal surface to the distal end; and
a terraced outer surface that tapers such that said sleeve is widest at the proximal surface and most narrow at the distal end,
a titanium insert that has a porosity of less than 10% and is positioned within said sleeve such that a portion of said insert is exposed within said outer surface, and
a tray adapter that is affixed to the titanium insert, the tray adaptor having a channel extending therethrough.
2. The tibial implant of claim 1 , wherein the shape and size of said sleeve generally correspond to the shape of cancellous bone associated with a proximal end of a tibia of a mammal.
3. The tibial implant of claim 1 , wherein the interior channel has a substantially oval cross-section.
4. The tibial implant of claim 1 , wherein the interior channel has a substantially round cross-section.
5. The tibial implant of claim 1 , wherein the interior channel has a substantially triangular cross-section.
6. The tibial implant of claim 1 , wherein said sleeve has a porosity of 60 to 80%.
7. The tibial implant of claim 1 , wherein the titanium or titanium alloy is Ti6A14V or CP titanium.
8. The tibial implant of claim 1 , wherein said channel in said tray adaptor is offset medially or laterally relative to the center of said interior channel of said sleeve.