SHORT-AND LONG-TERM OUTCOMES OF USING A MAXILLARY EXPANDER WITH TONGUE CRIB IN GROWING PATIENTS WITH OPEN BITE AND SKELETAL CLASS II MALOCCLUSIONS: A RETROSPECTIVE STUDY

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SHORT-AND LONG-TERM OUTCOMES OF USING A MAXILLARY EXPANDER WITH TONGUE CRIB IN GROWING PATIENTS WITH OPEN BITE AND SKELETAL CLASS II MALOCCLUSIONS: A RETROSPECTIVE STUDY

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Eurasian Journal of Medical and Natural Sciences

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This study aimed to assess the short-and long-term effects of rapid maxillary expansion (RME) in growing patients with Class II malocclusion and anterior open bite. A retrospective cohort study was conducted with 16 growing patients treated with a rapid maxillary expander (RME) combined with a crib (treatment group, TG) and 16 untreated patients with similar malocclusion (control group, CG). Cephalometric analyses were performed at three time points: before treatment (T0), at the end of the latency phase (T1), and prior to fixed appliance therapy (T2), to evaluate skeletal and dental changes in vertical, transverse, and sagittal dimensions. Statistical analysis was conducted with a significance level of α= 0.05.At the end of active expansion (T1), all patients in the TG achieved corrected overbite, with statistically significant differences compared to the CG (p > 0.05). A significant reduction in jaw divergence was observed in the TG compared to the CG (p < 0.05). By T2, treated patients maintained proper overbite correction. Statistical analysis demonstrated significant reductions in maxillary, mandibular, and intermaxillary divergence in the TG compared to the CG (p < 0.05). This treatment protocol was effective for growing open-bite patients,resulting in a long-term reduction in facial divergence. The fixed crib contributed to normalizing myofunctional activity

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# Anterior open bite# rapid maxillary expansion# fixed crib# jaw divergence# palatal crib

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https://eroi.uz/11.0201/A0225-0027

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