“…The connection between oral health and these diseases is largely attributed to inflammation, although there are two other pathways that may explain the association [ 19 , 20 , 21 ]. Firstly, some systemic diseases have direct links to negative impacts on oral health and oral health-related quality of life (OHRQoL), such as Crohn’s disease [ 22 , 23 ], Beçhet’s disease [ 24 , 25 , 26 ], scleroderma [ 27 , 28 ], oral cancer [ 29 , 30 , 31 , 32 ], head and neck cancer [ 33 ], and Sjögren’s syndrome [ 34 , 35 , 36 , 37 ]. Secondly, some chronic diseases may indirectly affect oral health, as they can lead to reduced motivation regarding oral hygiene and care.…”