Resorption inorganic binder for medical use and method of preparing bone substitute using same

A method of preparing an inorganic binder for medical use, the method comprising:

• preparing a starting material using α-tricalcium phosphate (α-TCP) powder and phosphate powder each of which has a predetermined particle size;
• homogeneously mixing the starting material;
• producing a paste having a predetermined viscosity that is suitable for preparation of a molded article by adding water or saline to the homogeneously mixed starting material and kneading the paste;
• molding the paste into a predetermined shape to obtain the molded article;
• subjecting the molded article to hydration reaction;
• and
• washing and drying the molded article having undergone the hydration reaction to obtain the inorganic binder containing octacalcium phosphate (OCP) and hydroxy apatite (HA) crystalline phases,
• wherein the phosphate powder comprises monobasic sodium phosphate(NaH2PO4), monobasic potassium phosphate (KH2PO4), or a combination thereof.