Intervertebral implant comprising a three-part articulation

An intervertebral implant having a central axis substantially parallel to or coaxial with an axis of a spinal column, comprising:

• an upper and a lower terminal part each fitted with an outermost surface configured transversely to the central axis, said upper terminal part having a first curved inner surface and said lower terminal part having a second curved inner surface, said first and second curved surfaces being opposite one another;
• and
• a joint element configured between the terminal parts and resting in a sliding manner against the curved inner surfaces of the upper and lower terminal parts, the joint element including first and second external convex slide surfaces, the first slide surface contacting the first curved inner surface of the upper terminal part, the second slide surface contacting the second curved inner surface of the lower terminal part, the first curved inner surface and the first slide surface forming a first joint rotatable about a first axis of rotation, the first axis of rotation being perpendicular to the central axis when in an initial position, the second curved inner surface and the second slide surface forming a second joint rotatable about a second axis of rotation, the second axis of rotation intersecting the central axis at an acute angle α, the second axis of rotation being spaced apart from the first axis of rotation by a distance A as measured along the central axis, wherein 0<distance A<18 mm.