Angle Orthod. 2018 Jul;88(4):435-441. doi: 10.2319/092917-656.1. Epub 2018 Mar 21.
To evaluate changes in the volume and cross-sectional area of the nasal airway before and 1 year after nonsurgical miniscrew-assisted rapid maxillary expansion (MARME) in young adults.
Fourteen patients (mean age, 22.7 years; 10 women, four men) with a transverse discrepancy who underwent cone beam computed tomography before (T0), immediately after (T1), and 1 year after (T2) expansion were retrospectively included in this study. The volume of the nasal cavity and nasopharynx and the cross-sectional area of the anterior, middle, and posterior segments of the nasal airway were measured and compared among the three timepoints using paired t-tests.
The volume of the nasal cavity showed a significant increase at T1 and T2 ( P < .05), while that of the nasopharynx increased only at T2 ( P < .05). The anterior and middle cross-sectional areas significantly increased at T1 and T2 ( P < .05), while the posterior cross-sectional area showed no significant change throughout the observation period ( P > .05).
The results demonstrate that the volume and cross-sectional area of the nasal cavity increased after MARME and were maintained at 1 year after expansion. Therefore, MARME may be helpful in expanding the nasal airway.
评估非手术微螺钉辅助上颌快速扩弓（MARME）前后年轻成人鼻气道体积和横截面积的变化。
本研究回顾性纳入了 14 名（平均年龄 22.7 岁；10 名女性，4 名男性）接受过锥形束计算机断层扫描的横向差异患者，分别在扩弓前（T0）、即刻（T1）和 1 年后（T2）进行测量。使用配对 t 检验比较三个时间点鼻腔和鼻咽腔的体积以及鼻气道前、中、后段的横截面积。
T1 和 T2 时鼻腔体积显著增加（P <.05），而鼻咽腔体积仅在 T2 时增加（P <.05）。T1 和 T2 时前、中横截面积显著增加（P <.05），而后段横截面积在整个观察期间无显著变化（P >.05）。
结果表明，MARME 后鼻腔体积和横截面积增加，并在扩张后 1 年得到维持。因此，MARME 可能有助于扩大鼻气道。
