Results in axial pullout tests in three groups (n = 8, means ± SD).
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CPS, PMMA-PS and EPS indicate conventional pedicle screw, polymethylmethacrylate-augmented pedicle screw and expansive pedicle screw, respectively. Fmax and E indicate the maximum pullout strength and energy-to-failure, respectively.*Compared with CPS group at the same study period, p0.05; & Compared with 6-week in the same group, p>0.05; Δ Compared with 6-week in the same group, p
创建时间：
2015-12-02
