Review Article
Rapid Maxillary Expansion and Upper Airway Morphology: A Systematic Review on the Role of Cone Beam Computed Tomography
| Studies | Mean age of intervention group | Type of expander | Activation protocol | 2nd CBCT acquisition |
| Pangrazio-Kulbersh et al. | First group, 12.6; second group, 13.5 | 13 banded versus 10 bonded | 4/6 weeks | After 6 months of retention | Riberio et al. | 7.5 years | McNamara | NS | 4 months after maxillary expansion | Chang et al. | 12.9 years | Hyrax expander | 1 activation for 28 days | 3-4 months after maxillary expansion | Iwasaki et al. | 9,96 years | NS | NS | 1,27 years after first acquisition | Zhao et al. | 12,8 years | Hyrax | 1 or 2 times per day for 4/6 weeks | From 8 months to 2 years after first acquisition | El and Palomo | 14 years | Hyrax | 2-time activation per day | NS | Zeng and Gao | 12,73 years | Hyrax | 2/3 weeks | 3 months after expansion | Christie et al. | 9.9 years skeletal 10 | Haas | 30 days | Immediately after expansion | da Baratieri et al. | 9.6 years | Haas | 2-time activation per day | 1 year after RME |
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NS, not specified.
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