AT	Adenotonsillectomy
AHI	Apnea-hypopnea index
BMIs	Body mass indices
CBCT	Cone beam computational tomography
CPAP	Continuous positive airway pressure
CT	Computed tomography
MAA	Mandibular advancement appliance
MCA	Minimum cross-sectional area
OSA	Obstructive sleep apnea
OSAS	Obstructive Sleep Apnea Syndrome
PAP	Pharyngeal airway passage
PMFT	Passive myofunctional therapy
PSG	Polysomnography
RME	Rapid maxillary expansion
RPE	Rapid palatal expansion/Rapid palatal expander
TB	Twin Block
TPD	Nasomaxillary expansion using skeletally anchored trans-palatal distraction