Dimensionally Stable Molded Bone Replacement Element with Residual Hydraulic Activity

Abstract

Dimensionally stable molded bone replacement elements made of mineral bone cement with residual hydraulic activity that contain at least one share of hardened mineral bone cement and at least one share of unconverted or unhardened reactive mineral bone cement, wherein the share of hardened mineral bone cement is 5% to 90% by weight. The dimensionally stable molded bone replacement elements have at least 5% of the maximum value of the strength of a completely hardened bone cement comprised of the same mineral components and with the same structural characteristics and reach compressive strengths in the range of 2 to 200 MPa. They are substantially free of water and can be converted under biological conditions.

1 . Dimensionally stable molded bone replacement elements made of mineral bone cement with residual hydraulic activity, comprising
 a. at least one share of hardened mineral bone cement,   b. at least one share of unconverted or unhardened reactive mineral bone cement,   wherein the dimensionally stable molded bone replacement elements have at least 5% of the maximum value of strength of a completely hardened bone cement made of the same mineral components and with the same structural characteristics, wherein the dimensionally stable molded bone replacement elements, which can be converted under biological conditions, 37° C. and water saturation, contain a share of hardened mineral bone cement of 5% to 90% by weight, wherein the dimensionally stable molded bone replacement elements have compressive strengths in the range of 2 to 200 MPa and wherein physically bound and condensed water has been completely withdrawn from the dimensionally stable molded bone replacement elements.   
     
     
         2 . Dimensionally stable molded bone replacement elements according to  claim 1 , wherein the at least one share of unconverted or unhardened reactive mineral bone cement contains at least one unconverted or unhardened reactive mineral bone cement component with a share of at least 10% by weight. 
     
     
         3 . Dimensionally stable molded bone replacement elements according to  claim 1 , wherein the dimensionally stable molded bone replacement elements have an overall porosity between 20% and 90%. 
     
     
         4 . Dimensionally stable molded bone replacement elements according to  claim 1  in the form of granules, wherein the individual granules have a size of >100 μm and <10 mm. 
     
     
         5 . Dimensionally stable molded bone replacement elements according to  claim 1 , wherein they have the shape of a printed 3D molded element.