269724.fig.003a
(a)
269724.fig.003b
(b)
269724.fig.003c
(c)
Figure 3: Representative optical microscopic images of hABMSCs stimulated for 4 days in static condition (A), at 20% duty cycle (B), and at 50% duty cycle (C) under LIPUS treatment (a). Representative FE-SEM morphologies of hABMSCs stimulated for 7 days in static condition (A), at 20% duty cycle (B), and 50% duty cycle (C) under LIPUS treatment (b). FE-SEM images showed more lining up observation at stimulation groups compared to control group (arrows: cell direction). Cell metabolic viability as optical density of hABMSCs measured using WST-1 (c). Overhead brackets with asterisks indicate significant difference between groups.