Loading patent…
AssigneesJapan Science and Technology Agency, National Institute for Materials
InventorsKenichi Shinomiya, Soichiro Itoh, Junzo Tanaka, Masanori Kikuchi
Estimating the term…
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 Col fiber while aligned each of the c-axes of the HAp particles along the Col fiber. The HAp/Col composite body is formed with a perforated aperture for allowing a blood vessel and an osteogenic cell to intrude thereinto. The present invention also provides a biodecomposable/bioabsorbable support for fixing an artificial vertebra, comprising a polylactic acid plate prepared by injection-molding molten polylactic acid and then extrusion-molding the injection-molded polylactic acid in such a manner that it is draw-oriented in a uniaxial direction. The plate has four corner regions each formed with a screw hole for fixing the plate to vertebral bodies.
An artificial vertebra system having a bone-marrow regenerating function and being transformable to an autologous bone, comprising a hydroxyapatite (HAp)/collagen (Col) composite body formed by pressure-dehydrating a coprecipitate of hydroxyapatite and collagen to have the weight ratio of HAp to Col ranging from 70:30 to 80:20 which is equivalent to that of a bone, and a nanocomposite structure in which HAp particles are conjugated along a Col fiber while aligned each of the c-axes of said HAp particles along said Col fiber, said HAp/Col composite body being formed with a perforated aperture for allowing a blood vessel and an osteogenic cell to intrude thereinto, said aperture being perforated in the frontward/rearward direction and rightward/leftward direction relative to the front side of a human body in a configuration analogous to that of a Volkmann's canal, wherein a plural number of said apertures are arranged at even intervals.
Dependencies are inferred from the claim text.