Regarding the IL‐17A gene, twelve studies evaluated the rs 2275913 upstream variant in 1791 individuals with periodontitis [42, 44, 46, 47, 48, 49, 50, 52, 53, 54, 56, 59] and in 15 individuals with peri‐implantitis [42]. The gene discussed is IL17A; the disease is periodontitis.