An artificial disc device for replacing a damaged nucleus is disclosed. In one form, the device may be inserted in components such that the device may be assembled within and retained by the natural annulus therein. In another form, the device may be inserted into the natural annulus in a collapsed or...http://www.google.com.au/patents/US20050192671?utm_source=gb-gplus-sharePatent US20050192671 - Artificial disc device
