It shows that the saturation index (SI) of calcium phosphate is the logarithmic functions of Ca and phosphate concentrations, and increases with the increasing of their concentrations.

• 研究表明,磷酸钙的饱和度指数值SI是其构成离子浓度钙离子和磷酸根离子的对数函数,随着构成离子浓度的升高而增大;