Fig. 2From: The influence of systemically or locally administered mesenchymal stem cells on tissue repair in a rat oral implantation modelHRP penetration on implant surface. a Light micrographs of the epithelial structure around the control, local, and systemic group implants after HRP penetration. Bar = 200 μm. b Median distance of HRP penetration. Each bar represents the mean ± SD of the three independent experiments. *p < 0.05 vs. ContBack to article page