| 摘要 |
<p>: For producing the bone substitute material from collagen and hydroxyl apatite, an aqueous solution of clean collagen is mixed with a cross-linking agent causing only a partial cross-linking, and the mixture is lyophilized. The quantity of the cross-linking agent is chosen such that the collagen retains its resorbability and its absorptivity vis-a-vis bodily fluids, the material further showing no undesirable side effects. Preferably less than 1% in weight of formaldehyde, one of the preferred cross-linking agents, is added, with reference to the dry weight of collagen, and sintered apatite grains with a diameter of 50-300 m are used. Such a bone substitute material is stronger and less tearable as previsouly known materials and insures a good promotion of the growth of own bone tissue and the substitution by it.</p> |
