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

Claim 6:
7. 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 curved engaging surface includes a curved boundary that extends within a first plane that is parallel with the sagittal plane;
wherein the curved boundary has a first arc radius along an anterior portion disposed on the anterior side of the core member;
wherein the curved boundary has a second arc radius along a posterior portion disposed on the posterior side of the core member, wherein the second arc radius is substantially different from the first arc radius;
wherein the first endplate has a recess that accommodates the curved engaging surface of the core member;
wherein in a neutral position of the artificial disc replacement device, the posterior portion is prevented from contacting the recess of the first endplate; and
wherein during extension at least some of the posterior portion contacts the recess.