OBJECTIVE To evaluate the changes of maxillary expansion and upper airway structure after microimplant assisted rapid palatal expansion (MARPE) using cone-beam computed tomography (CBCT). METHODS This retrospective study included 19 subjects (15 females and 4 males) aged 15-29 years old (mean, 19.95±4.39 years) with maxillary transverse deficiency treated with MARPE. CBCT was performed at the initial diagnosis and 3 months after MARPE treatment. Measurements were taken to evaluate the amount of total expansion, skeletal expansion, and dental expansion at the maxillary first premolar (P1), second premolar (P2), first molar (M1), second molar (M2) regions and upper airway changes. RESULTS After MARPE treatment, the maxillary skeletal base expansion, skeletal expansion, alveolar expansion and dental expansion were achieved at the P1, P2, M1, M2 region. The nasopharyngeal volume significantly increased 8.48% after MARPE treatment compared with that before the treatment (P < 0.05). The change of nasal lateral width (NLW) was also significantly different before and after MARPE (P < 0.05). However, there were no statistically significant change in the oropharyngeal, palatopharyngeal, glossopharyngeal and airway total volume (all P > 0.05). CONCLUSIONS MARPE can produce more transverse bone expansion, relieve maxillary transverse deficiency and improve upper airway ventilation.

中文翻译：

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微种植体辅助pa快速扩张中上呼吸道和骨骼的变化：锥形束计算机断层扫描（CBCT）研究。

目的利用锥形束计算机体层摄影术（CBCT）评估微种植体辅助快速pa扩展（MARPE）后上颌扩张和上呼吸道结构的变化。方法这项回顾性研究包括19位年龄在15-29岁（平均19.95±4.39岁）的上颌骨横行缺损的受试者（15名女性和4名男性），接受MARPE治疗。在初诊时和MARPE治疗后3个月进行CBCT。进行测量以评估上颌第一前磨牙（P1），第二前磨牙（P2），第一磨牙（M1），第二磨牙（M2）区域和上呼吸道改变的总扩张，骨骼扩张和牙齿扩张的量。结果经MARPE治疗后，在P1，P2，M1，M2区域。与治疗前相比，MARPE治疗后鼻咽体积明显增加了8.48％（P <0.05）。鼻侧宽度（NLW）的变化在MARPE前后也有显着差异（P <0.05）。然而，口咽，pa咽，舌咽和气道总体积没有统计学上的显着变化（所有P> 0.05）。结论MARPE可以产生更多的横向骨扩张，缓解上颌骨横向不足并改善上呼吸道通气。口咽，pa咽，舌咽和气道总体积无统计学意义的变化（所有P> 0.05）。结论MARPE可以产生更多的横向骨扩张，缓解上颌骨横向不足并改善上呼吸道通气。口咽，pa咽，舌咽和气道总体积无统计学意义的变化（所有P> 0.05）。结论MARPE可以产生更多的横向骨扩张，缓解上颌骨横向不足并改善上呼吸道通气。