US 11,696,831 B2
Hard-tissue implant comprising a bulk implant, a face, pillars, slots, and at least one support member
George J. Picha, Brecksville, OH (US); Grant Wesley Phillips, Richfield, OH (US); Rachel Smith, Brecksville, OH (US); James Price, Stow, OH (US); and Gregory Causey, Erie, CO (US)
Assigned to ALPS HOLDING LLC, Brecksville, OH (US)
Filed by ALPS HOLDING LLC, Brecksville, OH (US)
Filed on Aug. 5, 2021, as Appl. No. 17/394,896.
Application 17/394,896 is a division of application No. 16/492,285, granted, now 11,213,398, issued on Jan. 4, 2022, previously published as PCT/US2018/021499, filed on Mar. 8, 2018.
Claims priority of provisional application 62/469,727, filed on Mar. 10, 2017.
Prior Publication US 2021/0361436 A1, Nov. 25, 2021
Int. Cl. A61F 2/38 (2006.01); A61F 2/30 (2006.01); A61F 2/40 (2006.01); A61F 2/42 (2006.01); A61F 2/44 (2006.01); A61L 27/06 (2006.01); A61L 27/18 (2006.01); A61F 2/28 (2006.01)
CPC A61F 2/30771 (2013.01) [A61F 2/389 (2013.01); A61F 2/3859 (2013.01); A61F 2/4081 (2013.01); A61F 2/4202 (2013.01); A61F 2/4261 (2013.01); A61F 2/442 (2013.01); A61L 27/06 (2013.01); A61L 27/18 (2013.01); A61F 2/2803 (2013.01); A61F 2002/30069 (2013.01); A61F 2002/3093 (2013.01); A61F 2002/30224 (2013.01); A61F 2002/30326 (2013.01); A61F 2002/30383 (2013.01); A61F 2002/30896 (2013.01); A61F 2002/3863 (2013.01); A61F 2002/4205 (2013.01); A61F 2002/4207 (2013.01); A61F 2310/00017 (2013.01); A61F 2310/00023 (2013.01); A61F 2310/00029 (2013.01); A61F 2310/00293 (2013.01); A61F 2310/00359 (2013.01); A61L 2430/02 (2013.01); A61L 2430/38 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tibial implant for knee, the tibial implant comprising:
(a) a bulk implant;
(b) a planar face defining an exterior bone-engaging surface of the bulk implant, the exterior bone-engaging surface sized and configured to contact a resected surface of a proximal tibia;
(c) pillars for contacting a hard tissue, the pillars being distributed on the exterior bone-engaging surface, across an area of at least 30 mm2, and extending perpendicularly from the planar face, and each pillar being integral to the bulk implant, having a distal end, having a transverse area of (100×100) μm2to (10,000 ×10,000) μm2, and having a height of 100 μm to 10,000 μm;
(d) slots to be occupied by the hard tissue, the slots being defined by the pillars and each slot having a width of 100 μm to 10,000 μm as measured along the shortest distance between adjacent pillars; and
(e) at least one support member for contacting the hard tissue, the at least one support member being positioned on the exterior bone-engaging surface among the pillars, extending distally from the exterior bone-engaging surface, having a transverse area greater than the transverse area of any of the pillars, and having a height greater than the height of any of the pillars;
wherein the tibial implant has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of (i) the sum of the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1;
wherein:
one or more pillars have dimensions that differ from those of other pillars, such that the transverse areas and/or heights, and thus volumes, of the one or more pillars differ from those of the other pillars; and
the one or more pillars are distributed peripherally with respect to the exterior bone-engaging surface and are intended for insertion into cortical bone, and the other pillars are distributed centrally with respect to the exterior bone-engaging surface and are intended for insertion into cancellous bone; and
wherein the pillars are non-porous.