Patent ID: 8728163

Claim:
An intervertebral implant comprising: a first plate member having a bone engaging surface for engaging a first vertebral body; a second plate member having a bone engaging surface for engaging a second vertebral body; and a pivoting assembly disposed between the first plate member and the second plate member, the pivoting assembly adapted to enable the first plate member to pivot relative to the second plate member about a first axis extending through the pivoting assembly and inhibiting the first plate member from rotating relative to the second plate member about a second axis that is transverse to the first axis, the pivoting assembly including a cup sandwiched between a coupling member and a support member, wherein the cup, the coupling member, and the support member are separately stackable components of the pivoting assembly that cooperate to enable relative movement between the first and second plate members when stacked together between the first and second plate members, the support member having a substantially hemispherical dome and a pair of opposing arms extending therefrom, the cup having a complementary substantially hemispherical configuration and a pair of opposed openings configured to slidably engage the pair of opposing arms such that the cup is movable relative to the support member in a first direction and is inhibited from moving relative to the support member in a second direction that is orthogonal to the first direction.