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首页> 外文学位 >Treatment Effects of the Edgewise Mandibular Anterior Repositioning Appliance (MARA) in Patients with Class II Malocclusions: A Cephalometric Study.
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Treatment Effects of the Edgewise Mandibular Anterior Repositioning Appliance (MARA) in Patients with Class II Malocclusions: A Cephalometric Study.

机译：下颌前缘前向定位矫正器（MARA）在II类错牙合患者中的治疗效果：头颅测量研究。

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摘要

Objectives: To determine the skeletal and dentoalveolar effects produced by the MARA functional appliance in the treatment of growing patients with Class II malocclusions. Materials and Methods: A retrospective study was conducted using lateral cephalograms of patients consecutively treated with the MARA appliance (n=40) during their skeletal growth spurt as evaluated by the improved cervical vertebral maturation method recommended by Baccetti et al. A comparison was made with 24 untreated Class II control subjects obtained from the University of Michigan growth study and matched with the experimental groups for skeletal age, sex and craniofacial morphology. Cephalograms were taken at three time points: [T1] pre-treatment; [T2] post-functional appliance treatment; and [T3] fixed orthodontic treatment completion. Treatment changes were evaluated between the time points using 35 variables. Data were analyzed using independent t-tests. Results: At the post-functional appliances' phase (T1-T2), the MARA appliance showed significant increases in the total mandibular length, ramus height and anterior/posterior facial heights. These effects continued during the fixed orthodontic treatment stage (T2-T3). The net changes (T1-T3) revealed significant mandibular growth enhancement with the MARA appliance (+2.7mm) in comparison to untreated controls. The appliance also caused 5.2o of flaring in the mandibular incisors, as well as significant decreases in overjet, overbite and inter-incisal angle. Conclusion: Overall, the MARA appliance showed significant skeletal and dentoalveolar changes resulting in normalization of the Class II malocclusion.
机译：目的：确定由MARA功能矫治器在治疗II类错牙合畸形患者中产生的骨骼和牙槽骨作用。材料和方法：回顾性研究使用了Baccetti等人推荐的改良颈椎成熟方法评估的，在骨骼生长突增期间连续接受MARA矫治器（n = 40）治疗的患者的侧位头颅图。比较了从密歇根大学的生长研究中获得的24位未经治疗的II类对照受试者，并与实验组进行了骨骼年龄，性别和颅面形态的匹配。在三个时间点拍摄头颅图：[T1]预处理； [T2]功能后的器具治疗；和[T3]固定的正畸治疗完成。使用35个变量评估了两个时间点之间的治疗变化。使用独立的t检验分析数据。结果：在功能后器具阶段（T1-T2），MARA器具显示下颌总长度，支具高度和前/后面部高度显着增加。在固定的正畸治疗阶段（T2-T3）期间，这些作用持续存在。净变化（T1-T3）显示与未处理的对照组相比，MARA矫治器（+ 2.7mm）显着增强了下颌的生长。该器械还导致下颌切牙张开5.2o，并且过喷射，咬合和切齿间角度明显降低。结论：总体而言，MARA矫治器显示出明显的骨骼和牙槽泡变化，导致II类错牙合畸形正常化。

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  • 作者

    Al-Jewair, Thikriat.;

  • 作者单位

    State University of New York at Buffalo.;

  • 授予单位 State University of New York at Buffalo.;
  • 学科 Health Sciences Dentistry.
  • 学位 M.S.
  • 年度 2013
  • 页码 80 p.
  • 总页数 80
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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