AT	ALIGNERS THERAPY
CHX	chlorhexidine
CPP-ACP	phosphopeptides-amorphous calcium phosphate
CT	computer tomography scan
DC	dental caries
DMFT	the sum of the number of decayed, missing due to caries, and filled teeth in the permanent teeth
DNA	deoxyribonucleic acid
ECC	early childhood caries
ER-YAG LASER	yttrio-aluminum-garnet laser
FT	FIXED THERAPY
HOMINGS	human oral microbe identification
GI	gastrointestinal system
Illumina MiSeq	a benchtop instrument that utilizes a single-lane flow cell and a reagent cartridge supplied in kit form
Lactobacillus spp.	Lactobacillus species
MB	microbiota
MIH	molar-incisor hypomineralization
MM	microbiome
OM	oral microbiota
PCA	principal component analysis
pH	potential of hydrogen
RCTs	randomized controlled trials
RNA	ribonucleic acid
RTI	respiratory tract infections
S. mutans	Streptococcus mutans
SSK12	Streptococcus salivarius K12
WSL	white spot lesion