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Schematic representation of drug loading approaches on CaP scaffolds: (a) adsorption on bare CaP scaffold; (b) adsorption of drugs on bare CaP scaffolds followed by polymer coating to prevent burst release and have a sustained release; (c) polymer coating on bare CaP scaffolds followed by surface treatment of the coating, then adsorption of drugs or conjugation of drug molecules by chemical treatment; and (d) drugs can be encapsulated into the polymer coating itself.
