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Ultrasonic stimulation (US) and in vitro properties of the scaffolds. OD readings of MC3T3 cells as cultured on the piezoelectric scaffolds (PCL-65BT) with respect to different intensities of US over (a) 72 h and (b) 7 days. * means statistically significant (p < 0.05) with respect to “no scaffold, only US”. # means statistically significant (p < 0.05) with respect to the specimens in the “3 days” group.
