AHI	Apnea-Hypopnea index
AI	Apnea index
ANS	Anterior nasal spine
Ba	Basion
CBCT	Cone-beam computed tomography
CPAP	Continuous positive airway pressure
DISE	Drug-induced sleep endoscopy
DOME	Distraction osteogenesis maxillary expansion
MARPE	Mini-implant/mini-screw-assisted palatal expansion
MCA	Minimal cross-sectional area
N	Nasion
OSA	Obstructive sleep apnea
PAS	Posterior airway space
PNS	Posterior nasal spine
PSQ	Pediatric Sleep Questionnaire
RCT	Randomized controlled trials
RME	Rapid maxillary expansion
SARPE	Surgically assisted palatal expansion
SR-MA	Systematic review and meta-analysis
S	Sella
SN-GoGn	Angle formed by sella-nasion to gonion-gnathion
TPP	Tübingen palatal plate
TRMR	Tongue Range of Motion Ratio