Ewers R, Niederdellmann H
Dtsch Zahnarztl Z. 1977 Apr;32(4):349-52.
Because of the biomechanics of the mandible, several viewpoints must be considered in stable metal plate osteosynthesis. A particular AO mandibular dynamic compression (DC) plate with perforations in a 45 degrees arrangement ("Freiburg Zuggurtungsplatte") has been developed to create an interfragmentary pressure zone in the region of the teeth during function. Photoelastic experiments showed that interfragmentary pressure developed due to this arrangement of perforations. To avoid a gap in the lingual region distant from the plate and to enable interfragmentary pressure in this region during function, converging screws are discussed. Photoelastic experiments showed that by slight inclination of the screws in convergent position the interfragmentary pressure is already increased in the lingual fracture gap distant from the plate. For a better guide of the screws in convergent position, an alteration of the spheric DC slide hole should be considered.
由于下颌骨的生物力学特性，在稳定金属接骨板骨合成中必须考虑几个观点。一种特殊的AO下颌动力加压（DC）接骨板已被开发出来，其穿孔呈45度排列（“弗莱堡牵引板”），目的是在功能过程中在牙齿区域产生骨折块间压力区。光弹性实验表明，由于这种穿孔排列会产生骨折块间压力。为了避免在远离接骨板的舌侧区域出现间隙，并在功能过程中使该区域产生骨折块间压力，人们讨论了使用汇聚螺钉。光弹性实验表明，在汇聚位置使螺钉稍有倾斜，在远离接骨板的舌侧骨折间隙中骨折块间压力就已经增加。为了更好地引导处于汇聚位置的螺钉，应考虑对球形DC滑动孔进行改造。
