An implant configured to completely replace degenerated or damaged nucleus pulposus in an intervertebral disc. The implant comprises a silicone elastomer shell that is implanted into a void within the annulus fibrosus created by at least partial removal of the nucleus pulposus therefrom. A colloidal suspension of platinum cured silicone-based polymer and carbon nanotubes is injected into the elastomer shell. The colloidal suspension is irradiated with electromagnetic radiation, particularly infrared or near infrared light, to the point that it hardens. The hardened implant becomes a mechanical replacement for the original nucleus pulposus in the intervertebral disc.
