Department of Oral and Maxillofacial Surgery, Guangzhou Women and Children's Medical Center.
Department of Imaging, Guangzhou Women and Children's Medical Center, Guangzhou, China.
J Craniofac Surg. 2022 Jun 1;33(4):1051-1056. doi: 10.1097/SCS.0000000000008377. Epub 2021 Nov 12.
To study the changes of hyoid position in infants with Robin sequence before and after mandibular distraction osteogenesis, and to explore the related factors.
Twenty-six infants with Robin sequence underwent bilateral mandibular distraction osteogenesis from May 2016 to April 2020. Three-dimensional computed tomography data of patients before and after surgery were analyzed with Materialise Mimics 17.0. Changes in the three-dimensional position of the hyoid bone were studied.
The angle between the long axis of the tongue body and hard palate plane, and the angle between the long axis of the tongue body and mandibular plane were significantly decreased after surgery than before surgery. The hyoid bone-cranial base vertical distance, hyoid bone-mental point distance, and hyoid bone - epiglottis distance were significantly increased after surgery. The differences in the above-mentioned data were statistically significant ( P < 0.05). Changes in the angle between the long axis of the tongue body and the hyoid bone - mental point line correlated with changes in the position of the hyoid bone relative to the cervical spine ( P = 0.006). Postoperatively, the hyoid bone moved forward and the increase in the hyoid bone - mental point osseous distance interval (41.28%) was significantly greater than the increase in the hyoid bone-epiglottis distance (18.73%). Differences in the total mandibular length and the hyoid bone - cranial base vertical distance are related to the age at the operation ( P < 0.05). The younger the age at the time of surgical intervention, the greater the difference before and after surgery for the same follow-up interval.
The three-dimensional direction of the hyoid bone changes after the distraction osteogenesis of the mandible, and the hyoid bone moves downward and forward. Because the mandibular length and airway changed, the relative positions of the long axis of the tongue body on the sagittal plane rotated clockwise.
研究下颌骨牵引成骨术前后 Robin 序列婴儿舌骨位置的变化，并探讨相关因素。
2016 年 5 月至 2020 年 4 月，26 例 Robin 序列婴儿行双侧下颌骨牵引成骨术。利用 Materialise Mimics 17.0 分析患者术前和术后的三维 CT 数据，研究舌骨三维位置的变化。
术后舌体与硬腭平面的夹角、舌体与下颌平面的夹角均明显小于术前，舌骨颅底垂直距离、舌骨颏点距离、舌骨会厌距离均明显大于术后，差异均有统计学意义（ P ＜0.05）。上述数据的变化与舌骨颏点线与舌骨长轴之间的夹角变化相关（ P ＝0.006）。术后舌骨向前移动，舌骨颏点骨距增加（41.28%）明显大于舌骨会厌距离增加（18.73%）。总下颌长度和舌骨颅底垂直距离的差异与手术时的年龄有关（ P ＜0.05）。手术干预时年龄越小，相同随访间隔的术前术后差异越大。
下颌骨牵引成骨术后，舌骨的三维方向发生变化，舌骨向下向前移动。由于下颌骨长度和气道改变，矢状面上舌体长轴的相对位置顺时针旋转。
