A natural spinal disk including adjacent vertebral structures is removed from a deceased donor, rinsed in normal saline, preserved in a cryopreservative solution, and then frozen by gradually decreasing the temperature using liquid nitrogen or similar method. The implant may be thawed in normal saline...http://www.google.com/patents/US8048618?utm_source=gb-gplus-sharePatent US8048618 - Method for preparing and preserving a natural allograft intervertebral disk for humans
