Patent ID: 7402202
Filing Date: 2008-07-22
Classification: A61K,C04B

Abstract:
1. Method for the manufacture of a powdered material, the binder phase of which comprises a cement-based system, which powdered material has the capacity following saturation with a liquid reacting with the binder phase to hydrate to a radiopaque and chemically bonded ceramic material, characterized by the stages of: a) mixing raw materials for the binder phase containing Ca and Al in ratio Ca:Al greater than or equal to 1:2.4, but no greater than 3:2, b) physically reducing diffusions paths between atoms in the various raw materials, c) sintering the material at an increased temperature to form said binder phase, which comprises CaO.Al the material in stage a and/or following stage c being brought to contain 10-55% by volume of one or more additive consisting of glass, said additive containing a non-trace amount of one or more element with a density over 5 g/cm wherein said one or more element becomes present in solid solution (ss) in the binder phase, and fully or partly replaces the calcium and/or aluminium atoms in the binder phase.