Patent ID: 11938035
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. An artificial disc replacement device, comprising:
a first endplate configured to be disposed against a first vertebrae in a spine and a second endplate configured to be disposed against a second vertebrae in the spine;
a core member disposed between the first endplate and the second endplate, the core member having a curved engaging surface for engaging the first endplate;
the core member including a sagittal plane that separates the core member into a first lateral side and a second lateral side;
the core member also including a coronal plane that separates the core member into an anterior side and a posterior side;
wherein the first endplate has a recess having a curvature in the sagittal plane that accommodates a corresponding curvature of the curved engaging surface of the core member;
wherein the first endplate has a central axis;
wherein as the artificial replacement device undergoes flexion the central axis of the first endplate is translated in an anterior direction;
wherein as the artificial replacement device undergoes extension the central axis of the first endplate is translated in a posterior direction; and
wherein the geometry of the interface between the curved engaging surface and the recess of the first endplate enables the central axis of the first endplate to translate further in the anterior direction during flexion than in the posterior direction during extension.