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XRD pattern of hydration products of PLGA-PEG-PLGA/C3S/C2S/POP bone cement. The standard card numbers (ICDD PDF NO) corresponding to the objects shown in the figure are as follows: CaSO4 2H2O: 33–0311, C3S: 49–0442, C2S: 33–0302, Ca(OH)2: 44–1481.
