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Hydroxyapatite powder were synthesized by precipitation method, varying pH, and reactiontemperature. The powders were heated at 1,200°… and 1,300°… for fabrication of dentalprosthesis.The results are as follows:Synthesized powder showed the smallest particle in size, under the conditions of pH 11 andreaction temperature 37°…. The hydroxyapatite was partially converted to , ‚-TCP at 1,200°…and 1,300°….Mechanical strength of sample was affected by such powder preparation conditions as pH andreaction temperature and sintering temperature. The mechanical strength of sample prepared under the same conditions was increased withincreasing pH, reaction temperature and sintering temperature