Colloidal forming of chemically bonded calcium phosphate composites

Abstract

On the basis of mixtures of Ca₃(PO₄)₂(α-TCP)/CaO and α-TCP/CaMPO₄ powders (M = Na, K), self-hardening pastes are prepared whose treatment with solutions of sodium bicarbonate and calcium chloride results in the production of chemically bonded composites containing the phases of hydroxyapatite (HA) and calcium carbonate, as well as TCP and HA. The resulting materials can be used both as relatively dense composites (up to 75%) for osteoplasty and in the casting of settable ceramic slurries in plastic molds of special geometry for obtaining osteoconductive macroporous ceramics.