Hertrich K, Raab W H
Poliklinik für Kieferorthopädie, Universität Erlangen-Nürnberg.
Fortschr Kieferorthop. 1990 Oct;51(5):253-8. doi: 10.1007/BF02168925.
The influence of intrusive forces on the periodontal microcirculation exerted as conventional through brackets on the teeth is demonstrated with laser Doppler flowmetry. This noninvasive method shows that forces of 0.1 N on the human upper incisor cause a decrease of the periodontal perfusion of 20% which shall regain its initial level after 50-80 seconds. With an intrusive force of 0.5 N the perfusion decreases 42% within two to three seconds, which however shall not even regain its original level after ten minutes. Immobilisation of the teeth and infiltrative anaesthesia with vasoconstrictor were carried out in order to specify these measurements.
通过激光多普勒血流仪证明了传统方式通过牙托施加于牙齿上的侵入力对牙周微循环的影响。这种非侵入性方法表明，作用于人类上门牙0.1N的力会使牙周灌注降低20%，在50 - 80秒后会恢复到初始水平。施加0.5N的侵入力时，灌注在两到三秒内降低42%，然而十分钟后甚至都无法恢复到原来的水平。为了明确这些测量结果，进行了牙齿固定和使用血管收缩剂的浸润麻醉。
