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X-ray diffraction patterns of (A) CPC, (B) 1-HA/CPC and (C) 4-HA/CPC cements before and after immersion in PBS for 0, 7, 14 and 21 days. (a)Hydroxyapatite; (b) as prepared cement before immersion; cements immersed in PBS for 7 days (c), 14 days (d) and 21 days (e).
