An intervertebral implant system installable between a pair of vertebrae. The implant includes a spacer that fits between the pair of vertebrae with a screw aperture for passage of a first screw and angled to orient the first screw into a first vertebrae at an angle relative to the rear sidewall of the spacer so that the first screw will enter an endplate of the first vertebrae. A plate is installable onto the rear sidewall of the polymeric spacer. The plate includes an angled screw aperture that is aligned with the screw aperture of the spacer when the plate is installed on the spacer. An elevated screw support extends upwardly or downwardly from the plate so as to extend opposite the direction of the angled screw aperture. The elevated screw support locates a second screw to enter a second vertebrae through an anterior surface of the second vertebrae.
