Colloidal dispersion of calcium phosphate tablets and method of obtaining the same

A method for preparing the dispersions of calcium phosphate platelets, wherein the length of the platelets, L, is between 5 and 500 nm and the thickness of the platelets is between 0.5 and 20 nm, and at least one polymer which complexes calcium comprising the steps of:

• i) preparing a solution of calcium salts and adjusting the pH to a selected value of between 4 and 6;
• ii) adding a phosphate solution to the solution obtained in step i) over a period of time of between 30 minutes and 4 hours, so as to obtain a calcium to phosphorus molar ratio of between 1 and 2.5, wherein the pH is maintained constant at the selected value of between 4 and 6 until a calcium phosphate platelet dispersion is formed;
• iii) heat treating the dispersion obtained in step ii) at a temperature of between 50° C. and 95° C.;
• iv) washing the dispersion obtained in step iii);
• v) adding a dispersion agent to the dispersion obtained in step iv);
• vi) separating the colloidal dispersion obtained in step v);
• wherein in at least one of steps i) or ii), the solutions further comprise ammonium ions;
• and wherein at least one polymer which complexes calcium is added during step i) or ii).