Cell proliferation of MC3T3-E1 osteoblast-like cells on HAP, HAP—30% PA, and HAP—30% PA—12 h at 1, 4, and 7 days. At 4 and 7 days, cell proliferation on HAP—30% PA and HAP—30% PA—12 h was significantly higher than that on HAP (); the difference in the cell proliferation on HAP—30% PA and HAP—30% PA—12 h was not statistically different ().
