The Hydration Product of α-TCP and Effect of Factor Dai Honglian Chen Fang Yan YuhuaThe authors studied the pH value's variation and the hydration products of α-TCP Cie, α-Calcium metaphosphate at 37 ℃ with different beginning conditions by analysed the solution property of differrent Calcium phosphates. The authors further discussed the effects of HAP (Hydroxyapatite) on hydration of α-TCP.a-Calcium metaphosphate; hydration products; influence factor