Table 2. Quantification of area and penetration changes for phases at each time point for samples aged in PBS based on the dominant phase calculated at each spatial location.

Time (days)	Composition (wt%)			Approximate OCP penetration (μm)
	Brushite	OCP	TCP
0	89	0	11	0
5	88	1	11	150
10	90	6	4	350
20	50	8	42	520
30	38	23	39	750
50	13	44	43	1300