| OSA | Obstructive Sleep Apnea |
| RME | Rapid Maxillary Expansion |
| MARPE | Mini-Implant Assisted Rapid Maxillary Expansion |
| MPE | Maxillary Palatal Expansion |
| CBCT | Cone-Beam Computed Tomography |
| AR | Acoustic Rhinometry |
| AHI | Apnea–Hypopnea Index |
| MSE | Maxillary Skeletal Expander |
| MCA | Minimal Nasal Cross-Sectional Areas |
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