Figure 5. mRNA expression of bone repair factors. Type I collagen (A), type III collagen (B), osteocalcin (OCN) (C), bone morphogenetic protein-2 (BMP-2) (D), and BMP-4 (E) after treatment with sodium hyaluronate (HY). *P<0.05 compared to control (two-way ANOVA followed by Bonferroni post-hoc test).