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Malleable demineralized bone composition and method of manufacture

  • US 10,596,298 B2
  • Filed: 04/22/2016
  • Issued: 03/24/2020
  • Est. Priority Date: 04/22/2016
  • Status: Active Grant
First Claim
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1. A malleable demineralized bone composition consisting of cortical bone wherein a first portion of cortical bone is made from cut pieces freeze dried then ground into particles and demineralized then freeze-dried and a second portion of cortical bone is shaved into shavings, the shavings being strips subjected to freeze-drying, the freeze-dried shavings being ground and demineralized to a particle size up to 125 microns and then freeze-dried a second time;

  • and wherein a volume of the freeze-dried particles of the second portion placed in a solution of sterile water to create a mixture, the water volume being twice the volume of freeze-dried particles of the second portion, the mixture consisting of only demineralized cortical bone particles up to 125 microns and sterile water is autoclaved over 1.25 hours including conditioning of 15 minutes, exposure of 30 minutes and drying of 30 minutes, the exposure being under heat of 121.1 degrees C. at a pressure of 30.15 psi to liquify the bone particles to form a gelatin, the gelatin being cooled not to exceed 40°

    C. when the first portion is mixed with the liquid gelatin and thereafter cooled to form a malleable putty or paste, wherein the ratio of gelatin to particles from the first portion is 80;

    20 by volume and wherein the ground particles of the first portion are sieved to a first size range of 125 to 300 microns, a second size range 300 to 500 microns and a third range 500 to 850 microns and wherein the first size through second size and third size have a ratio of 40;

    40;

    20 by weight, respectively.

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