Fig. 7. Immunohistochemical staining of tissues surrounding different implants at day 1, 3, 7, 14, 28 after implantation. (a) Qualitative evaluation, scale bar: 200 μm; (b) magnification of the IHC image, scale bar: 40 μm; (c) quantitative assessment of CD11b+ cell density around the implants. “&” indicates the implantation area. “#” indicates cell number. *, p < 0.05; **, p < 0.01; ns, no significant difference.