Disclosed is an artificial vertebra having a bone-marrow regenerating function, comprising a hydroxyapatite (HAp)/collagen (Col) composite body formed by pressure-dehydrating a coprecipitate of hydroxyapatite and collagen to have a nanocomposite structure in which HAp particles are conjugated along a...http://www.google.com/patents/US6887272?utm_source=gb-gplus-sharePatent US6887272 - Artificial pyramid
