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首页> 外文期刊>Maxillofacial Plastic and Reconstructive Surgery >Change of the upper airway after mandibular setback surgery in patients with mandibular prognathism and anterior open bite
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Change of the upper airway after mandibular setback surgery in patients with mandibular prognathism and anterior open bite

机译：下颌前突和前路开放性咬合的患者下颌后退手术后上呼吸道的变化

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Abstract PurposeIt has been reported before that the amount of pharyngeal airway space (PAS) significantly decreases following mandibular setback (MS) surgery in patients with mandibular prognathism (MP). Further, MP patients with an anterior open-bite (AOB) presentation may show a larger decrease in PAS compared with those without AOB. However, studies on postoperative PAS changes in MP patients with AOB remain rare. This study sought to evaluate changes in PAS and hyoid bone positioning following MS surgery in MP patients with and without AOB.Patients and methodsTwenty patients who underwent two jaw surgery involving MS movement were included. Patients were divided into a non-AOB group ( n = 10; overbite 2?mm) and an AOB group ( n = 10; overbite ? 4?mm). Three-dimensional changes in PAS and hyoid bone positioning were compared and statistically evaluated pre- and postoperatively using computed tomography (CT).ResultsThe mean magnitude of MS was 6.0 ± 2.8?mm and 5.6 ± 3.2?mm in the non-AOB group and AOB group, respectively. The oropharyngeal volume and upper hypopharyngeal volume were significantly reduced after surgery in both the groups ( p = 0.006 and p = 0.003), while the retroglossal cross-sectional area was significantly reduced only in the AOB group ( p = 0.028). Although the AOB group showed a larger decrease in PAS, the difference was not statistically significant between the groups. The position of the hyoid bone showed significant posterior and inferior displacement only in the AOB group, while the vertical displacement of the hyoid bone showed a statistically significant difference between the two groups.ConclusionPAS was significantly decreased after MS in both the groups, while only the AOB group presented a statistically significant reduction in the retroglossal cross-sectional area. Vertical displacement of the hyoid bone showed a statistically significant difference between the groups, while the PAS change was not. Surgeons should be aware of potential postoperative airway problems that may arise when performing MS surgeries.
机译：摘要目的已有报道称，下颌前突（MP）患者下颌后退（MS）手术后，咽气道间隙（PAS）的数量明显减少。此外，与没有AOB的MP患者相比，有前开口（AOB）表现的MP患者的PAS下降可能更大。但是，关于AOB的MP患者术后PAS变化的研究仍然很少。本研究旨在评估患有和不患有AOB的MP患者MS手术后PAS和舌骨位置的变化。患者和方法包括20例接受了两次MS颌骨手术的患者。将患者分为非AOB组（n = 10;咬合力> 2？mm）和AOB组（n = 10;咬合力≤4？mm）。比较了PAS和舌骨位置的三维变化，并在术前和术后采用计算机断层扫描（CT）进行了统计学评估。结果非AOB组和MS组的平均MS值分别为6.0±2.8？mm和5.6±3.2？mm。 AOB组分别。两组术后口咽体积和下咽上体积均显着减少（p = 0.006和p = 0.003），而仅AOB组的舌后横断面积显着减少（p = 0.028）。尽管AOB组的PAS下降幅度更大，但两组之间的差异在统计学上并不显着。舌骨的位置仅在AOB组中有明显的前后移位，而舌骨的垂直移位在两组之间有统计学上的显着差异。结论两组均在MS术后PAS明显降低，而仅在AOB组的后反射横截面面积在统计学上显着减少。舌骨的垂直位移在各组之间显示出统计学上的显着差异，而PAS变化则没有。外科医生应意识到进行MS手术时可能出现的术后气道问题。

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