Fig. 14. Relative expression levels of ALP, type-1 collagen (Col-1), bone morphogenetic protein (BMP-2), RUNX2, osteocalcin (OCN) and osteopontin (OPN) in the osteoblasts that were cultured on each sample for 14 days. The values were normalised to the expression level of glyceraldehyde 3-phosphate dehydrogenase (GAPDH). *p < 0.05, **p < 0.01 compared with Ti and #p < 0.05 and ##p < 0.01 compared with HA.
