IL17A and Peri-Implantitis: Some pro-inflammatory cytokines were significantly higher in peri-implantitis compared to healthy implants, including IL-1β (1403.0 (735.8, 2083.8) pg/mL vs. 4311.0 (2388.5, 5502.5) pg/mL; p < 0.001; q = 0.004), IL-6 (5.4 (4.5, 8.2) pg/mL, vs. 38.3 (16.2, 221.7) pg/mL; p < 0.001; q = 0.006), and IL-17A (3.7 (3.4, 4.0) pg/mL vs. 10.5 (6.0, 6.3) pg/mL; p = 0.002; q = 0.006).