Fig. 6From: Effects of micro-porosity and local BMP-2 administration on bioresorption of β-TCP and new bone formationTRAP-positive cells. The mean number of TRAP-positive cells in group A was significantly smaller than that in group B at every period. The mean number of TRAP-positive cells in group C was larger than that in group B at 4 weeks, but smaller than that in group B at 8, 12, and 24 weeks (*p < 0.05)Back to article page