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首页> 美国卫生研究院文献>Dentistry Journal >Myofunctional Trainer versus Twin Block in Developing Class II Division I Malocclusion: A Randomized Comparative Clinical Trial
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Myofunctional Trainer versus Twin Block in Developing Class II Division I Malocclusion: A Randomized Comparative Clinical Trial

机译：肌功能训练器与孪生阻滞在发展中的I类I类错牙合：随机比较临床试验。

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This study aimed to evaluate and compare the dentoalveolar effects of the myofunctional trainer T4K versus twin block in children with class II division I malocclusion. Two parallel arm randomized comparative clinical trial was conducted, including twenty healthy children, 9–12 years old, showing Angle’s class II division I malocclusion due to mandibular retrusion. Children were randomly assigned into two groups according to the appliance used; Group 1: T4k, and Group II: twin block. Follow-up was done every 4 weeks for 9 months. Postoperative cephalometric X ray, study casts and photographs were taken for measurements and comparison. T4K showed a statistically significant reduction in the overjet (−2.50 ± 1.00 mm) ( < 0.0001), and a significant increase in the lower arch perimeter (LAP) (1.19 ± 0.96 mm) ( = 0.01). The twin block showed a statistically significant reduction in the overjet (−3.75 ± 1.10 mm) ( < 0.0001), a significant reduction in the overbite (−16.22 ± 17.02 %) ( = 0.03), and a significant increase in the LAP (1.69 ± 0.70 mm) ( < 0.0001). The overjet showed a higher significant decrease in the twin block group than in T4K ( = 0.03). The mean values of the overbite were significantly decreased in twin block than in T4k ( < 0.0001). Both groups showed significant dentoalveolar improvements toward class I occlusion; however, the twin block showed significantly better results than T4K appliance.
机译：这项研究旨在评估和比较肌功能教练员T4K与双胞胎阻滞对I类I类错牙合儿童的牙槽骨影响。进行了两项平行臂随机对照临床试验，其中包括20名9-12岁的健康儿童，这些儿童表现出下颌后退引起的安格尔II类I类错牙合。根据所使用的器具，将儿童随机分为两组。第一组：T4k，第二组：双发。每4周进行一次随访，持续9个月。术后进行头颅X射线检查，研究石膏和照片进行测量和比较。 T4K在统计上显示出过喷射的显着减少（-2.50±1.00毫米）（<0.0001），而下弓周长（LAP）则显着增加（1.19±0.96毫米）（= 0.01）。孪生块显示出统计上的过喷射量显着减少（−3.75±1.10 mm）（<0.0001），过咬量显着减少（−16.22±17.02％）（= 0.03）和LAP显着增加（1.69） ±0.70毫米）（<0.0001）。与T4K组相比，双嵌段组的过喷射明显降低（= 0.03）。与T4k中相比，双胎阻滞中的超咬平均值显着降低（<0.0001）。两组均显示出对I级牙合的显着改善。但是，孪生模块显示出比T4K设备明显更好的结果。

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