Myobrace 和 Twin-block 治疗对牙牙槽、骨骼、咽气道、颈椎姿势、舌骨位置和软腭的影响：一项回顾性研究。
Dentoalveolar, skeletal, pharyngeal airway, cervical posture, hyoid bone position, and soft palate changes with Myobrace and Twin-block: a retrospective study.
机构信息
Department of Orthodontics, Faculty of Dentistry, Sivas Cumhuriyet University, Sivas, Turkey.
Department of Orthodontics, Afyonkarahisar Health Science University, Afyonkarahisar, Turkey.
出版信息
BMC Oral Health. 2023 Jan 30;23(1):53. doi: 10.1186/s12903-023-02773-x.
BACKGROUND
The primary aim of this study was to evaluate the dentoalveolar, skeletal, pharyngeal airway, cervical posture, hyoid bone position, and soft palate effects of the Myobrace and Twin-block appliances. The second was to compare them in terms of ease of use by assessing the factors that may influence patient compliance.
METHODS
The study included thirty-six Class II division 1 patients (19 females, 17 males; mean age, 12.14 ± 1.23) who had previously been treated in the Orthodontic Clinic at Sivas Cumhuriyet University Faculty of Dentistry. The patients were divided into two groups: Group 1: Myobrace (n = 18), and Group 2: twin block (n = 18). The effects of the appliances on the skeletal, dentoalveolar, soft tissue, craniocervical, and other anatomic structures were assessed using 46 measurements (22 linear and 24 angular), on pre and post-treatment cephalometric radiographs. AudaxCeph 5.0 software (Ljubljana, Slovenia) was used for the analysis. To analyze the changes after one year of treatment, a paired sample t-test and Wilcoxon signed-rank test were used. Intergroup comparison was performed using the Student t-test and the Mann-Whitney U test.
RESULTS
In the Myobrace and Twin-block groups, there was a significant increase in SNB (°) (p = 0.004, p = 0.001), IMPA (°) (p = 0.005, p = 0.001) and a significant drop in U1/SN (°) (p = 0.021, p = 0.005). The lengths of Cd-Gn (mm), Go-Pg (mm), and Cd-Go (mm) increased significantly in the Twin-block group (p = 0.003, p = 0.010, p = 0.001), whereas the Myobrace group did not change. Similarly, there was no significant difference in pharyngeal and soft palate measurements in the Myobrace group but a statistically significant decrease in SP length and angle in the Twin-block group (p = 0.001, p = 0.006). Increases in SN/OPT (°) (p = 0.032, p = 0.001) and SN/CVT (°) (p = 0.012, p = 0.001) were statistically significant in both groups. Myobrace was more difficult to use while sleeping, whereas the twin block caused more nausea.
CONCLUSIONS
Both appliances can be used for mandibular advancement. The Twin-block appliance, on the other hand, was more effective and patient-friendly.
背景
本研究的主要目的是评估 Myobrace 和 Twin-block 矫治器对牙牙槽、骨骼、咽气道、颈椎姿势、舌骨位置和软腭的影响。第二个目的是通过评估可能影响患者依从性的因素，比较它们在使用便利性方面的差异。
方法
本研究纳入了 36 名安氏Ⅱ类 1 分类错颌患者（19 名女性，17 名男性；平均年龄 12.14±1.23 岁），这些患者均曾在锡瓦斯共和大学牙科学院正畸科接受治疗。患者被分为两组：Myobrace 组（n=18）和 Twin-block 组（n=18）。使用 46 项测量值（22 项线性和 24 项角度），在治疗前后的头颅侧位片上评估矫治器对骨骼、牙牙槽、软组织、颅颈和其他解剖结构的影响。使用 AudaxCeph 5.0 软件（斯洛文尼亚卢布尔雅那）进行分析。为了分析治疗 1 年后的变化，使用配对样本 t 检验和 Wilcoxon 符号秩检验。使用学生 t 检验和 Mann-Whitney U 检验进行组间比较。
结果
在 Myobrace 和 Twin-block 组中，SNB（°）（p=0.004，p=0.001）、IMPA（°）（p=0.005，p=0.001）显著增加，U1/SN（°）（p=0.021，p=0.005）显著降低。Twin-block 组的 Cd-Gn（mm）、Go-Pg（mm）和 Cd-Go（mm）长度显著增加（p=0.003，p=0.010，p=0.001），而 Myobrace 组没有变化。同样，Myobrace 组的咽腔和软腭测量值无显著差异，但 Twin-block 组的 SP 长度和角度显著降低（p=0.001，p=0.006）。两组的 SN/OPT（°）（p=0.032，p=0.001）和 SN/CVT（°）（p=0.012，p=0.001）均显著增加。Myobrace 在睡眠时使用更困难，而 Twin-block 会引起更多的恶心。
结论
两种矫治器都可用于下颌前伸。然而，Twin-block 矫治器更有效，且患者更易接受。
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