Intervertebral Fusion Implant

An intervertebral implant for implantation in a treated area of an intervertebral space between vertebral bodies of a spine, wherein said implant comprises:

• a spacer having an inferior and superior surface, wherein the inferior and superior surfaces each have a contact area capable of engaging with anatomy in the treated area, and the inferior and superior surfaces define a through-hole and an inner surface extending through the spacer;
• screw holes extending to the inferior and superior surfaces of the spacer;
• a plate rigidly coupled to the spacer, wherein the plate contains screws holes for receiving screws;
• and
• a screw back out prevention mechanism adapted on the plate and prevents the back out of screws from the screw holes,
• wherein the plate comprises an extension that is adapted to mate with a connection groove on an anterior portion of the spacer, the extension extending an entire length of the plate and the connection groove extending the entire length of the anterior portion of the spacer,
• and wherein the plate is not moveable with respect to the spacer.

An implant for positioning between adjacent intervertebral bodies comprising:

• a spacer having an anterior portion, a posterior portion, first and second side portions, and superior and inferior surfaces;
• and
• a plate having an anterior face and a posterior face, first and second side portions, and superior and inferior surfaces;
• wherein the plate comprises an extension extending out from the posterior portion of the plate and extending the entire length of the plate,
• wherein the extension of the plate mates with a connection groove of the spacer, the connection groove of the space configured on the anterior portion of the spacer and extending the entire length of the spacer,
• where connection pins couple the spacer to the plate so that the plate does not move with respect to the spacer.