Multi-component artificial disc replacements (ADRs) facilitate in situ assembly within a disc space. In contrast to single-component ADRs, which use endplates constructed of a single material, assembled ADRs according to the invention allow the use of more than one material, even for the endplates themselves...http://www.google.ca/patents/US20040186577?utm_source=gb-gplus-sharePatent US20040186577 - In situ artificaial disc replacements and other prosthetic components
