Miguel José Augusto M, Masucci Caterina, Fernandes Luciana Quintanilha Pires, Artese Flavia, Franchi Lorenzo, Giuntini Veronica
Department of Orthodontics, School of Dentistry, State University of Rio de Janeiro, Boulevard 28 de Setembro, 157, Vila Isabel, Rio de Janeiro, RJ 20551-030, Brésil
Sous-section d’Orthopédie Dento-Faciale, Faculté de Chirurgie dentaire, Université de Nice Sophia Antipolis, 24 avenue des Diables Bleus, 06357 Nice cedex 04, France
Orthod Fr. 2022 Sep 1;93(3):289-300. doi: 10.1684/orthodfr.2022.94.
To compare dentoskeletal changes produced by the maxillary splint headgear and cervical headgear appliance during the early phase of Class II treatment, specially the initial overjet and upper incisors position.
In this retrospective study, 28 Class II patients treated with the maxillary splint headgear (maxillary splint headgear or MSG, mean age 10.1 ± 1.9 years) and 28 Class II patients treated with cervical headgear (cervical headgear group or CHG, mean age 9.5 ± 1.9 years) were evaluated before and after treatment. Statistical comparisons between the two groups for cephalometric measurements at T1 and for T2-T1 changes were performed by means of independent sample t tests.
The MSG showed a significantly greater reduction of the overjet in comparison to the CHG (-2.4 mm and -0.7 mm, respectively) and a significantly greater maxillary incisor uprighting (-1.8 mm and 0.4 mm, respectively). In the MSG, overjet correction was due mainly to mandibular advancement (3.5 mm), while the correction of molar relationship (3.9 mm) was 64% skeletal and 36% dentoalveolar. In the CHG, the overjet correction was also more skeletal, due to mandibular growth (1.8 mm), while correction of molar relationship (3.5 mm) was 63% dentoalveolar and 37% skeletal.
Both groups showed favorable skeletal mandibular changes, which was more significant in the MSG. Regarding tooth movement, the maxillary splint headgear was more effective in uprighting upper incisors and reducing the overjet than cervical headgear appliance.
比较上颌夹板式头帽和高位头帽矫治器在Ⅱ类错颌早期治疗中产生的牙颌面变化，特别是初始覆盖和上颌切牙位置。
在这项回顾性研究中，对28例使用上颌夹板式头帽治疗的Ⅱ类患者（上颌夹板式头帽组或MSG组，平均年龄10.1±1.9岁）和28例使用高位头帽治疗的Ⅱ类患者（高位头帽组或CHG组，平均年龄9.5±1.9岁）在治疗前后进行评估。通过独立样本t检验对两组在T1时的头影测量值以及T2 - T1变化进行统计学比较。
与CHG组相比，MSG组的覆盖减少更为显著（分别为 - 2.4 mm和 - 0.7 mm），上颌切牙内收也更为显著（分别为 - 1.8 mm和0.4 mm）。在MSG组中，覆盖的纠正主要是由于下颌前伸（3.5 mm），而磨牙关系的纠正（3.9 mm）中64%是骨骼性的，36%是牙 - 牙槽性的。在CHG组中，覆盖的纠正也更多是骨骼性的，这是由于下颌生长（1.8 mm），而磨牙关系的纠正（3.5 mm）中63%是牙 - 牙槽性的，37%是骨骼性的。
两组均显示出有利的下颌骨骼变化，在MSG组中更为显著。关于牙齿移动，上颌夹板式头帽在使上颌切牙内收和减少覆盖方面比高位头帽矫治器更有效。
