325605.fig.001
Figure 1: XRD patterns for sintered calcium phosphate pellets prepared in ratio of [Ca]/[P] = 1.50 and immersed in normal saline solution at 37°C for various lengths of time (■: Ca2P2O7). (a) 0 d, (b) 2 d, (c) 4 d, (d) 7 d, (e) 14 d, (f) 28 d, and (g) 42 d.