“…Both diseases involve an excessive inflammatory response in the intestinal or oral mucosa, respectively, to a microbial trigger in a susceptible host. This response is characterized by massive tissue infiltration by neutrophils, as first‐line defence mechanism, which at the same time causes tissue destruction (Cho, 2008 ; Graves, 2008 ; Indriolo et al, 2011 ; Bartold & Van Dyke, 2013 ; Bertl et al, 2016 ; de Souza & Fiocchi, 2016 ). Additionally, both diseases share common risk factors (e.g., poor oral hygiene, smoking, diet, psychosocial stress, etc.)…”