Hard palate deformation in an animal model following quasi-static loading to stimulate that of orthodontic anchorage implants
Hard palate deformation in an animal model following quasi-static loading to stimulate that of orthodontic anchorage implants
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DOI：
10.1093/ejo/23.4.349
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发表时间：
2001-08-01
影响因子：
2.6
通讯作者：
Harzer, W
中科院分区：
文献类型：
--
作者：
Gedrange, T;Köbel, C;Harzer, W
本研究的目的是为年轻患者确定适当的种植体治疗。在动物模型腭变形进行了研究，急性准静态负荷。进行了三个系列的试验（用新生猪、幼猪和成年猪），每个系列有两组（一点或两点应激），每组5-7只动物。将直径为3 mm和6 mm的圆盘放置在第1组的缝合区域中，并将第2组的圆盘放置在缝合线的右侧和左侧。通过计算机三维（3D）图像评估系统分析变形，在年轻动物中，在显著较低的力水平下的一点载荷与两点载荷相比导致骨折（P < 0.001）。通过将一个椎间盘的大小从3 mm增加到5 mm来测量类似的结果（P < 0.001）。相比之下，成年猪用两种方法显示稳定的结果。一般来说，椎间盘直径越大，不稳定性越小，一点载荷似乎适合成年动物，而两点载荷可能有利于骨化。两点载荷的优点是产生更高的应力，因此改善了对牙齿固定的控制。然而，需要进一步的测试来研究长期影响。
The aim of the present investigation was to identify adequate implant treatment for young patients. In an animal model palate deformation was investigated by acute quasi-static loading. Three series of tests (with newborn, young and adult pigs) were performed, each with two groups (one or two-point stress) and 5-7 animals per group. Discs with a diameter of 3 and 6 mm were placed in group 1 in the suture area, and in group 2 at both the right and left sides of the suture. Deformation was analysed by a computerized three-dimensional (3D) photo-imaging evaluation system.In young animals the one-point load at a significantly lower force level led to fractures in comparison with the two-point load (P < 0.001). Similar results were measured by an increase in the size of one disc from 3 to 5 mm (P < 0.001). In contrast, adult pigs showed stable results with both methods. In general, a larger disc diameter led to less instability.The one-point load seems to be suitable for adult animals, whereas a two-point load might be favourable during ossification. The advantage of the two-point load is the generation of a higher stress and therefore improved control of dental fixation. However, further tests are necessary to investigate the long-term effects.