Kim Jae-Seung, Kim Jin Kook, Hong Seok-Chan, Cho Jae Hoon
Department of Dentistry, Konkuk University School of Medicine, Seoul, South Korea.
J Oral Maxillofac Surg. 2013 Sep;71(9):1603.e1-6. doi: 10.1016/j.joms.2013.04.021. Epub 2013 Jun 27.
To evaluate the change in the upper airway in a Class II malocclusion deformity after counterclockwise maxillomandibular advancement.
Seventeen young Korean women with a Class II malocclusion deformity who had undergone Le Fort I and bilateral mandibular ramus sagittal split osteotomy in a counterclockwise rotation were enrolled in the present study. The upper airway was measured at 3 different levels (uvula tip, low C2, and mid C3) using lateral cephalograms at 3 points: preoperatively (T0) and 2 (T2) and 12 (T12) months postoperatively. The changes in the upper airway were then compared.
The mandible advanced an average of 7.0 ± 3.8 mm. The upper airway had widened considerably at all 3 levels at T2 and had decreased slightly at T12, especially at the low C2 level compared with T0. However, the upper airway at T12 remained wider than at T0 at all 3 levels. The mandibular advancement and upper airway width correlated only at T12 at the mid C3 level.
The upper airway became wider in patients with a Class II malocclusion deformity who had undergone mandibular advancement. However, this might become narrower with time.
评估逆时针方向上颌下颌前徙术后安氏II类错牙合畸形患者上气道的变化。
本研究纳入了17名患有安氏II类错牙合畸形的年轻韩国女性，她们均接受了逆时针旋转的Le Fort I型截骨术和双侧下颌升支矢状劈开截骨术。使用头颅侧位片在3个不同水平（悬雍垂尖、C2下缘和C3中点）的3个点测量上气道：术前（T0）以及术后2个月（T2）和12个月（T12）。然后比较上气道的变化。
下颌平均前徙7.0±3.8mm。在T2时，上气道在所有3个水平均显著增宽，而在T12时略有减小，尤其是在C2下缘水平与T0相比。然而，在所有3个水平，T12时的上气道仍比T0时宽。下颌前徙与上气道宽度仅在T12时在C3中点水平相关。
接受下颌前徙术的安氏II类错牙合畸形患者的上气道变宽。然而，随着时间推移可能会变窄。
