Patent ID: 7637950

Claim:
An intervertebral implant comprising: a pair of mutually opposite superior and inferior main faces and a side face, wherein said superior main face includes mutually parallel shaped teeth and at least one spike, each of said teeth having a first side face and a second side face, said spike projecting from at least one of said first side face or said second side face of at least one tooth and upwardly beyond said teeth, said at least one spike intersecting at least one of said teeth, said spike differing in structure from said teeth, wherein the general shape of a profile of said superior main face in at least one plane extending transversely to said superior main face is curved and wherein said side face includes a first cylindrical portion extending more than 180 degrees about a first cylinder axis, and a second cylindrical portion of greater radius than said first cylindrical portion, the second cylindrical portion extending about a second cylinder axis, parallel to the first cylinder axis.