Abstract: A method for preparing a calcium phosphate pasty material for injection which after, setting, is designed to form an apatite material consists in: producing from water and calcium phosphates pasty mixture capable of developing, hardening and forming a hydroxyapatite. The method is characterised in that it consists in adding to the calcic phosphates or to the pasty mixture before it is injected a methicone having relative to the mixture more than 0.30 wt. % and less than 10 wt. %. The resulting material can be injected, that is it can be transported in pasty form into a conduit under moderate pressure levels. The material sets on the site of implantation and hardens to form an apatite biomaterial in a manner similar to known methicone-free calcium phosphate mixtures.

Abstract: A solid powder product with a Ca/P ratio of between 1.40 and 1.90 is prepared from tricalcium phosphate and tetracalcium phosphate. An aqueous solution containing calcium ions and phosphate ions with a Ca/P ratio higher than 0.20 and lower than 0.50 is prepared. The aqueous solution and the solid powder product and optionally water are mixed to obtain a mixture with a liquid/solid weight ratio of between 0.30 and 0.65 and a resulting paste with a Ca/P ratio of between 1.50 and 1.67.

Abstract: The invention concerns a method for preparing a calcium phosphate pasty material for injection which after, setting, is designed to form an apatite material. Said method consists in: producing from water and calcium phosphates pasty mixture capable of developing, hardening and forming a hydroxyapatite. Said method is characterized in that it consists in adding to the calcic phosphates or to the pasty mixture before it is injected a methicone having relative to the mixture more than 0.30 wt. % and less than 10 wt. %. The resulting material can be injected, that is it can be transported in pasty form into a conduit under moderate pressure levels. Said material sets on the site of implantation and hardens to form an apatite biomaterial in a manner similar to known methicone-free calcium phosphate mixtures.

Abstract: A process for manufacturing an apatite ceramic, especially for biological use involves the preparation of a homogeneous mixture of powders to form a hydroxyapatite of formula Ca10(PO4)6(OH)2, stoichiometric or non-stoichiometric, possibly containing other additives or flaws, compacting the mixture under a pressure of 100 to 500 Mpa at room temperature, and subjecting it to hydrothermal treatment at low temperature (100 to 500° C.) in the presence of water and in a sealed chamber.