In vivo relative mRNA expression levels of markers related to (a) inflammation: the tumor necrosis factor-α (Tnf-α) and interleukin 10 (Il-10) (b) bone resorption: tartrate-resistant acid phosphatase (Trap) and calcitonin receptor (CalcR) were analyzed as phenotypic markers, and cathepsin K (Ctsk), vacuolar type proton ATPase (H+ATPase) and metalloproteinase 9 (Mmp9) as functional osteoclastic markers and, (c) osteoblast-osteoclast interaction: osteoprotegerin (Opg) and RankL, determined by real time RT-PCR from peri-implant bone tissue on the different quercitrin implant surfaces after 8 weeks of healing. Values represent mean ± SEM, n = 6, a.u. (arbitrary units). The t-test was performed for all markers except for RankL which was analyzed by the Mann-Whitney test: * p < 0.05 vs. Ti, #
p < 0.05 vs. APTES.