API	Approximal Plaque Index
BMI	Body Mass Index
BOP	Bleeding on Probing
C	Cheek
GCF	Gingival crevicular fluid
GM-CSF	Granulocyte-macrophage colony-stimulating factor
HOMD	Human Oral Microbiota Database
HP	Hard palate
IL-1β	Interleukin 1 beta
IL-2	Interleukin 2
IL-4	Interleukin 4
IL-6	Interleukin 6
IL-8	Interleukin 8
IL-10	Interleukin 10
IL-32	Interleukin 32
IL-33	Interleukin 33
IFN-γ	Interferon gamma
MDS	Multidimensional scaling
OTU	Operational taxonomic unit
P	Plaque
PPD	Periodontal probing depth
PSI	Periodontal Screening Index
S	Saliva
SEM	Standard error of mean
SFFR	Sulcus fluid flow rate
spp.	Species
T	Tongue
TNF	Tumor-necrosis-factor
U	Sublingual area