Fig. 5　Posterolateral lumbar fusion (PLF) bone volume. PLF bone volumes were measured at 8 weeks post-surgery. Data are presented as mean ± SD (n = 6 rats per group) . Statistical analysis was performed using one-way ANOVA followed by Tukey’s post-hoc test. F (3, 20) = 139.27, p < 0.001. *p < 0.05 vs. control group.