Allogenic or xenogenic materials are used to provide intervertebral disc nucleus implants and/or annular plugs. The allogenic or xenogenic materials comprise natural disc annulus material, which may have a portion of the anterior longitudinal ligament attached. The tissue may be used “as is” without...http://www.google.de/patents/US7309359?utm_source=gb-gplus-sharePatent US7309359 - Allogenic/xenogenic implants and methods for augmenting or repairing intervertebral discs
