Severino et al. [31] demonstrated that higher expression of IL-17 was found in peri-implantitis compared to healthy implants; however, there was no significant difference when comparing the levels of IL-6 from 14 peri-implantitis samples and 11 healthy implant samples using the enzymatic immunosorbent assay (ELISA). Here, IL17A is linked to Peri-Implantitis.