CXCL2 and Peri-Implantitis: Significant higher levels of chemokine CXCL2 (331.7 (214.1, 672.8) pg/mL vs. 1220.5 (726.3, 1880.0) pg/mL; p < 0.001; q = 0.002) were found in the PICF of peri-implantitis implants compared to healthy implants, with a fold change of 3.4.