CBD	Cannabidiol
CIs	Confidence intervals
HA	Hyaluronic acid
LLLT	Low-level laser therapy
OAUs	Oral aphthous ulcers
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
RCTs	Randomized controlled trials
RAS	Recurrent aphthous stomatitis
SMD	Standardized mean difference
TA	Triamcinolone
TGO	Triester glycerol oxide
VAS	Visual analogue scale