Calcium polyphosphates(CPP)were modified by doping alkali metals ions(K+ and Na+ ) with different proportions to study its degradability and mineralization ability. Doped CPP samples were immersed in simulated body fluids(SBF) during 1,2,3, 7,14,21,28 and 35 days to study the degradability and mineralization ability. The weight loss of degraded samples, Ca2+and PO43-concentrations change, and pH value in SBF were measured to characterize the degradability. Doped CPP samples were characterized by XRD, FTIR and SEM. The results showed that doping proportion with molar ratio higher than 5% largely accelerated degradation rate. Higher doping proportion of K+ and Na+ resulted in positive effect on the degradability and mineralization ability of CPP.
