CPC A61F 2/3094 (2013.01) [A61C 8/0013 (2013.01); A61C 13/0019 (2013.01); A61F 2/28 (2013.01); A61F 2/2846 (2013.01); A61F 2/30771 (2013.01); A61F 2/30907 (2013.01); A61F 2/30942 (2013.01); A61F 2/44 (2013.01); A61F 2/4455 (2013.01); A61L 27/505 (2013.01); A61L 27/56 (2013.01); B33Y 80/00 (2014.12); A61F 2/30767 (2013.01); A61F 2002/0081 (2013.01); A61F 2002/2835 (2013.01); A61F 2002/30006 (2013.01); A61F 2002/30014 (2013.01); A61F 2002/3014 (2013.01); A61F 2002/30069 (2013.01); A61F 2002/3092 (2013.01); A61F 2002/3093 (2013.01); A61F 2002/30113 (2013.01); A61F 2002/30141 (2013.01); A61F 2002/30143 (2013.01); A61F 2002/30146 (2013.01); A61F 2002/30148 (2013.01); A61F 2002/30151 (2013.01); A61F 2002/30154 (2013.01); A61F 2002/30156 (2013.01); A61F 2002/30263 (2013.01); A61F 2002/30273 (2013.01); A61F 2002/30677 (2013.01); A61F 2002/30766 (2013.01); A61F 2002/30914 (2013.01); A61F 2002/30919 (2013.01); A61F 2002/30943 (2013.01); A61F 2210/0057 (2013.01); A61F 2240/001 (2013.01); A61F 2310/00023 (2013.01); A61L 2430/02 (2013.01); B29C 64/165 (2017.08)] | 17 Claims |
1. A porous lattice structure for use in medical implants, the porous lattice structure comprising:
a plurality of repeating unit cells, each unit cell comprising:
a plurality of sub-unit cells, each sub-unit cell comprising:
a plurality of connected faces configured to define a volume of the sub-unit cell;
a node located within the volume of the sub-unit cell; and
a plurality of struts extending from the node within the volume of the sub-unit cell and defining a plurality of rhombic openings therebetween, wherein at least one rhombic opening comprises two internal angles that equal a lateral separation angle ranging between 109.5 degrees and 180 degrees;
a first loading direction; and
a second loading direction oriented at an angle offset from the first loading direction;
wherein the porous lattice structure comprises a first elastic modulus in the first loading direction and a second elastic modulus in the second loading direction, wherein the first elastic modulus is less than the second elastic modulus and the porous lattice structure comprises at least one of a rhombic dodecahedron shaped sub-unit cell and a radial dodeca-rhombus shaped sub-unit cell.
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