AD	Alzheimer’s disease
MeSH	medical subject headings
Aβ	amyloid-β
MCI	moderate cognitive impairment
PI	plaque index
DMFT	decayed, missing, and filled teeth
GI	gingival index
MMS	mini-mental state examination
IL-6	interleukin-6
OD	odds ratio
PPD	pocket probing depth
CAL	clinical attachment loss
CRP	protein C reactive
OHAT	Oral health Assessment Tool
SCFAs	short-chain fatty acids