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Cumulative Ca2+ ion release in the release media from bare TCP (a), PCL-coated TCP scaffolds (b) at pH 5.0, and from bare TCP scaffolds at pH 7.4 (c) as a function of release time (Ca2+ release was not observed at all-time points). No detectable Ca2+ ion release was observed from PCL-coated scaffolds at pH 7.4 within the ppm (μg/mL) range.
