Hahn Wolfram, Dathe Henning, Fialka-Fricke Julia, Fricke-Zech Susanne, Zapf Antonia, Kubein-Meesenburg Dietmar, Sadat-Khonsari Reza
Department of Orthodontics, Georg-August-University of Göttingen, Göttingen, Germany.
Am J Orthod Dentofacial Orthop. 2009 Jul;136(1):12.e1-7; discussion 12-3. doi: 10.1016/j.ajodo.2008.12.015.
The aim of the study was to quantify the forces delivered by thermoplastic appliances made of 2 materials with 2 thicknesses to a maxillary central incisor during tipping.
Two materials were tested, each in 2 thicknesses: Erkodur (Erkodent Erich Kopp GmbH, Pfalzgrafenweiler, Germany) 1.0 and 0.8 mm, and Biolon (Dreve Dentamid GmbH, Unna, Germany), 1.0 and 0.75 mm. For each material, 5 appliances were produced. To measure the forces applied, an isolated measuring tooth, part of a standardized resin model, was deflected in 0.05 degrees steps from 0 degrees to 0.42 degrees in the vestibular and palatine directions, after placing the respective appliance on the model. For statistical analysis, the force components Fx/tipping and Fz/intrusion at a displacement of +/- 0.151 mm from the incisor edge were selected. Means and standard deviations were calculated. The Wilcoxon 2-sample test for group pairings was used.
The norms for the mean Fx forces ranged from 1.62 (SD, 0.41) to 5.35 N (SD, 0.63). The mean Fz forces were between 0.07 (SD, 0.13) and -2.47 N (SD, 0.34). The highest intrusive forces were measured during vestibular displacement of the measuring tooth. The forces delivered by the thick appliances were overall significantly higher (P <0.0001) than those of the thin materials. The forces delivered by the Biolon appliances were generally significantly higher (P <0.0001) than those for the Erkodur materials.
The forces applied were mostly too high when compared with those stated in the literature as ideal. In addition to thickness, the thermoforming process influences the magnitude of the force delivered by a thermoformed appliance.
本研究的目的是量化由两种材料、两种厚度制成的热塑性矫治器在倾斜过程中施加于上颌中切牙的力。
测试了两种材料，每种材料有两种厚度：德国埃尔科登特公司（Erkodent Erich Kopp GmbH, Pfalzgrafenweiler, Germany）的埃尔科杜尔（Erkodur），厚度为1.0毫米和0.8毫米；以及德国德雷夫公司（Dreve Dentamid GmbH, Unna, Germany）的比奥隆（Biolon），厚度为1.0毫米和0.75毫米。每种材料制作5个矫治器。为测量施加的力，在将相应矫治器放置在标准化树脂模型上后，将作为标准化树脂模型一部分的孤立测量牙在前庭和腭侧方向以0.05度的步长从0度偏转到0.42度。进行统计分析时，选取距切缘位移为±0.151毫米时的力分量Fx/倾斜和Fz/内收。计算均值和标准差。采用Wilcoxon双样本组间配对检验。
平均Fx力的范围为1.62（标准差，0.41）至5.35牛（标准差，0.63）。平均Fz力在0.07（标准差，0.13）至 -2.47牛（标准差，0.34）之间。在测量牙前庭位移期间测得的内收力最高。厚矫治器施加的力总体上显著高于（P <0.0001）薄材料的力。比奥隆矫治器施加的力通常显著高于（P <0.0001）埃尔科杜尔材料的力。
与文献中所述的理想力相比，施加的力大多过高。除了厚度外，热成型工艺也会影响热成型矫治器施加的力的大小。
