Systems and methods for spinal fusion

A spinal fusion implant configured to be positioned in an interbody space between a first vertebra and a second vertebra, comprising:

• a proximal wall;
• a distal wall;
• an anterior wall;
• a posterior wall;
• an implant upper surface comprising upper surfaces of each of the proximal wall, the distal wall, the anterior wall and the posterior wall;
• an implant lower surface comprising lower surfaces of each of the proximal wall, distal wall, anterior wall and posterior wall;
• a plurality of upper ridges on an upper surface of the anterior wall and an upper surface of the posterior wall, each ridge running in a direction perpendicular to the anterior and posterior walls;
• and
• a plurality of lower ridges on a lower surface of the anterior wall and a lower surface of the posterior wall, each ridge running in a direction perpendicular to the anterior and posterior walls, and
• a plurality of anti-migration features, each anti-migration feature including:
• a portion disposed within one wall selected from the proximal wall, the distal wall, the anterior wall, and the posterior wall,
• a first end protruding from the implant upper surface, and
• a second end protruding from the implant lower surface,
• wherein the plurality of upper ridges and the plurality of lower ridges are configured to resist proximal movement when engaged in the interbody space,
• wherein the anterior wall has a first length and is configured to face an anatomically anterior aspect of the interbody space while the implant is positioned in the interbody space;
• wherein the posterior wall has a second length and is configured to face an anatomically posterior aspect of the interbody space while the implant is positioned in the interbody space;
• wherein the anterior wall meets the distal wall at a first corner having a first corner radius of curvature and meets the proximal wall at a second corner having a second corner radius of curvature;
• wherein the posterior wall meets the distal wall at a third corner having a third corner radius of curvature and meets the proximal wall at a fourth corner having a fourth corner radius of curvature;
• wherein the first corner radius of curvature and the second corner radius of curvature are greater than the third corner radius of curvature and the fourth corner radius of curvature such that the second length is greater than the first length;
• and
• wherein the plurality of anti-migration features includes:
• a first spike element including a portion disposed within the proximal wall, the first spike element in proximity to the fourth corner,
• a second spike element including a portion disposed within the distal wall, the second spike element positioned opposite the first spike element and in proximity to the third corner,
• a third spike element including a portion disposed within the posterior wall, the third spike element positioned between the first spike element and the second spike element, and
• a fourth spike element including a portion disposed within the anterior wall, the fourth spike element positioned opposite and parallel to the third spike element.