Patent ID: 6548080
Filing Date: 2003-04-15
Classification: A61B,A61F,A61L,Y10S

Abstract:
A method for partially demineralizing a previously shaped cortical bone structure comprising the steps of:a) soaking said previously shaped cortical bone structure in an acid solution for a time period at a temperature less than about 30Â° C. to remove a layer of the cortical bone structure and produce a demineralized layer on the cortical bone structure ranging from about 0.05 mm to about 0.08 mm with the remaining area comprising mineralized bone, the cortical bone structure after partial demineralization being rigid and maintaining substantially its original mechanical strength; b) agitating the acid solution and immersed cortical bone structure; c) removing the cortical bone structure from the acid solution and washing the cortical bone structure until the wash discard is at about a neutral pH; d) packaging the cortical bone structure in a moisture permeable container; and e) lyophiizig the cortical bone structure.