Biodegradable composite material comprises at least one inorganic component (a), an inorganic component (b), and at least one organic component (c), where the density of the inorganic component (a) and the inorganic component (b) is different. An independent claim is also included for producing a composite material, comprising (i) adding at least one organic component (c) to a water-containing solution to form a suspension, (ii) adding the inorganic components (a) and (b), optionally the inorganic component (d), and a crosslinking agent to the suspension obtained in step (i) and mixing the components to form a solution, (iii) transferring the solution obtained in step (ii) to a mold, and drying the mixture by lyophilization to produce the composite material.
