Abstract
Fluoridated apatites were synthesized at a wide range of calcium-phosphate molar ratios, (Ca/P)f, at 80℃ and pH7.4, and at a constant calcium-fluoride feed ratio, (Ca/F)f.In spite of the constant(Ca/F)f of 5, F- uptake of fluoridated apatites synthesized at(Ca/P)f below 1.67 was strongly inhibited.The a-axis dimension, crystallinity and solubility of these fluoridated apatites varied with fluoride content in roughly the same manner as those with various degrees of fluoridation(X=0〜1), synthesized at a constant(Ca/P)f of 1.67.These results suggest that the physicochemical properties of fluoridated apatites are more strongly affected by fluoride content than other ions.
