a biocompatible material which is the product of graft - copolymerization of a water - soluble vinyl and / or an acrylate monomer with a sorption complex of polysilicic acid and collagen that has been rid of pigments , glycoproteins and proteoglycans , or a product obtained by virtue of chemical destruction , with the aid of hydrofluoric acid , of the afore - mentioned product of graft - copolymerization , containing up to 25 mass percent of polysilicic acid , up to 12 mass percent of protein , and maximum 1 10 - 6 mole / g of an anion of hydrofluoric and hydrofluoric acids , methods of making the same and products produced thereby .