Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champolion street, Azarita, Alexandria, Egypt.
Pebs Dental Clinic, Brussels, Belgium.
Sci Rep. 2024 Aug 21;14(1):19410. doi: 10.1038/s41598-024-69717-5.
The aim of this study was to compare the changes in the sagittal pharyngeal airway dimension (SPAD) in adolescents with Class II mandibular retrusion treated with Invisalign Mandibular Advancement (IMA), prefabricated Myobrace (MB), and Twin block (TB). For this retrospective study, the pre-treatment and post-treatment lateral cephalograms of 60 patients who underwent myofunctional treatment, using either one of the tested appliances were gathered from the files of treated patients. Changes in the SPAD were measured in each group, and comparisons were carried out between the three study groups. Additionally, sagittal skeletal measurements were carried out. Comparisons of the study variables at T0 and T1 between the three groups were performed using one-way ANOVA, while comparisons of the difference (T1-T0) were performed using Kruskal Wallis test. A significant SPAD increase has been reported using the three tested appliances (p < 0.05), with the least change documented with MB use (p < 0.05). Significant antero-posterior improvements have been found with IMA, MB, and TB with an increase in the SNB°, and a decrease in ANB° and Wits appraisal (p < 0.05). Non-significant FMA° changes have been observed post-treatment in the three test groups (p > 0.05). The IMA, MB, and TB generated significant SPAD and sagittal changes, with both IMA and TB surpassing MB in the airway area improvement post-treatment. Moreover, the three tested Class II functional appliances did not affect the vertical dimension.
本研究旨在比较安氏 II 类下颌后缩青少年患者使用 Invisalign 下颌前伸（IMA）、预制 Myobrace（MB）和 Twin block（TB）治疗后，咽腔矢状径（SPAD）的变化。本回顾性研究从治疗患者的档案中收集了 60 名接受肌功能治疗的患者的治疗前和治疗后侧位头颅侧位片。在每个组中测量 SPAD 的变化，并在三组之间进行比较。此外，还进行了矢状骨骼测量。使用单向方差分析比较三组 T0 和 T1 之间的研究变量，使用 Kruskal Wallis 检验比较差异（T1-T0）。使用三种测试设备报告了显著的 SPAD 增加（p<0.05），使用 MB 时记录的变化最小（p<0.05）。IMA、MB 和 TB 均发现有显著的前后向改善，SNB°增加，ANB°和 Wits 评估减少（p<0.05）。在三个测试组中，治疗后 FMA°无显著变化（p>0.05）。IMA、MB 和 TB 产生了显著的 SPAD 和矢状变化，IMA 和 TB 在治疗后气道面积改善方面均优于 MB。此外，三种测试的安氏 II 类功能性矫治器对垂直维度没有影响。
