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Biomechanical results of vertebral body specimens. Asterisks showed the statistically significant difference between OP group and sham group at the same time point. At 4, 6, and 8 weeks after injection in OP group, (a) the elastic modulus, (b) ultimate stress, and (c) yield stress were decreased significantly. Transverse lines with asterisks above showed the differences in OP group among different time points. ∗ P < 0.05.
