CXCL8 and periodontitis: The results showed that the IL-8 rs4073 (A251T/T-353A), A2767T, T11722T2, rs2234671, rs2230054 (C785T), rs1126579 (T1208C), rs2227306 (C781T), rs2227307 (G396T), rs2227532 (T-845C), and T-738A polymorphisms were not significantly related to periodontitis susceptibility; however, there was a significant difference in the IL-8 C1633T and rs1126580 (G1440A) polymorphisms between the periodontitis patients and healthy control groups.