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. 2022 Jul 25;10:921284. doi: 10.3389/fbioe.2022.921284

FIGURE 5.

FIGURE 5

BNNT nanoparticles can internalize external ultrasonic irradiation into electrical stimulation. Under the direct piezoelectric effect, ultrasound, as a mechanical stress, is transformed into electrical stimulation and then promotes proliferation and differentiation of osteoblasts (Jacob et al., 2018).