Transforaminal intersomatic cage for an intervertebral fusion graft and an instrument for implanting the cage

An intersomatic cage for an intervertebral fusion graft comprising a body generally defining an arc, the body comprising:

• a first longitudinal extremity of the body;
• a second longitudinal extremity of the body;
• a lateral concave surface defining a lateral arc congruent with the lateral concave surface and extending past the first longitudinal extremity and the second longitudinal extremity of the body and defining opposite convex and concave sides of the lateral arc, with the lateral concave surface configured to mate with a complementary support of an insertion instrument;
• a lateral convex surface;
• a substantially transverse upper surface;
• a substantially transverse lower surface;
• an end wall at the first longitudinal extremity of the body, the end wall comprising an end hole configured to receive a retaining end of a rod of an implantation instrument and oriented substantially tangential to the arc defined by the body;
• and an incurvate return part located at the second longitudinal extremity of the body opposite the end wall and protruding from the body across the lateral arc, with the incurvate return part disposed on the concave side of the lateral arc and the rest of the body lying on the convex side of the lateral arc.