Intervertebral spacer with chamfered edges

A spacer comprising:

• an elongate body having:
• a central longitudinal axis extending through the body;
• an anterior portion having an anterior end;
• a posterior portion, distal from the anterior portion, having a posterior end;
• a superior surface extending between the anterior end and the posterior end;
• an inferior surface extending between the anterior end and the posterior end;
• a first sidewall extending between the superior surface and the inferior surface on a first side of the longitudinal axis;
• and
• a second sidewall extending between the superior surface and the inferior surface on a second side of the longitudinal axis,
• wherein a first diagonal distance between an intersection of the first sidewall and the superior surface an intersection of the second sidewall and the inferior surface is less than a second diagonal distance between an intersection of the first sidewall and the inferior surface and an intersection of the second sidewall and the superior surface,
• wherein each of the first sidewall and the second sidewall comprises a longitudinal indentation comprising a superior sidewall surface, an inferior sidewall surface, and a side surface extending between and connecting the respective superior sidewall surface and the respective inferior sidewall surface,
• wherein the longitudinal indentation extends from the anterior portion to the posterior portion,
• wherein the longitudinal indentation extends through the anterior end;
• wherein the body has an elongated opening extending between the superior surface and the inferior surface and the elongated opening extending from the posterior portion to the anterior portion of the superior and inferior surfaces,
• wherein an opening extends from the superior surface of the anterior portion to the inferior surface of the anterior portion,
• wherein each of the intersection of the first sidewall and the superior surface and the intersection of the second sidewall and the inferior surface comprises a chamfered surface, and
• wherein each of the first and second chamfered edges includes a linear portion disposed between a first radius and a second radius.

An implant assembly comprising:

• an implant having:
• an elongate body having:
• a central longitudinal axis extending through the body;
• an anterior portion having an anterior end;
• a posterior portion, distal from the anterior portion, having a posterior end;
• a superior surface extending between the anterior portion and the posterior end;
• an inferior surface extending between the anterior end and the posterior end;
• a first sidewall extending between the superior surface and the inferior surface on a first side of the longitudinal axis;
• and
• a second sidewall extending between the superior surface and the inferior surface on a second side of the longitudinal axis, each of the first sidewall and the second sidewall comprising a longitudinal indentation comprising a superior sidewall surface, an inferior sidewall surface, and a side surface extending between and connecting the respective superior sidewall surface and the respective inferior sidewall surface,
• wherein the longitudinal indentation extends from the anterior portion to the posterior portion,
• wherein the longitudinal indentation extends through the anterior end;
• wherein an intersection of the first sidewall and the superior surface comprises a first chamfered edge and wherein an intersection of the second sidewall and the inferior surface comprises a second chamfered edge,
• wherein each of the first and second chamfered edges includes a linear portion disposed between a first radius and a second radius,
• wherein the first chamfered edge has a greater chamfer than the second chamfered edge;
• and
• an insertion tool removably attachable to the implant and adapted to insert the implant between adjacent discs, the insertion tool comprising:
• a handle;
• and
• a gripper extending distally from the handle, the gripper having a first fork and a second fork extending generally parallel to the first fork, wherein a gap is provided between the first fork and the second fork, the gap being sized to allow the first fork to be inserted along the longitudinal indentation in the first wall and to allow the second fork to be inserted along the longitudinal indention in the second sidewall,
• wherein the body has an elongated opening extending between the superior surface and the inferior surface and the elongated opening extending from the posterior portion to the anterior portion of the superior and inferior surfaces, and
• wherein an opening extends from the superior surface of the anterior portion to the inferior surface of the anterior portion.