Hirano S
Department of Geriatric Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University.
Kokubyo Gakkai Zasshi. 1992 Mar;59(1):124-41. doi: 10.5357/koubyou.59.124.
The purpose of this study was to analyze the creep phenomena of the palatal mucosa under pressure and after pressure release. The measuring device consisted of the control box, which regulated the loading force by air pressure, and the pick-up, which was fixed to the teeth and applied the load onto the mucosa, detected the displacement of the mucosa. The creep was analyzed by the Voigt 4 element model. The ratio of the recovery (S1'/S1, S2'/S2) and the recovery percentage were analyzed on the creep after the pressure release and evaluated from the point of expressing exactly the viscoelastic recovery. The results were as follows: 1. Both the amount of the displacement under pressure and the recovery of the palatal mucosa showed the least value at the center site and at the other sites less at the distal site than the mesial site. 2. The ratio of S1'/S1 was about 0.5 at all sites. On the other hand, the ratio of S2'/S2 showed values higher than 1 except at the center site and was significantly different among the other sites. 3. It was pointed out that the recovery percentage was more suitable than the ratio of the recovery to explain the viscoelastic recovery of the palatal mucosa.
本研究的目的是分析腭黏膜在受压及压力释放后的蠕变现象。测量装置由通过气压调节加载力的控制箱和固定在牙齿上并将载荷施加于黏膜、检测黏膜位移的传感器组成。采用Voigt四元件模型分析蠕变。对压力释放后的蠕变进行分析，从准确表达黏弹性恢复的角度评估恢复率（S1'/S1、S2'/S2）和恢复百分比。结果如下：1. 受压时的位移量及腭黏膜的恢复在中央部位最小，在其他部位，远中部位小于近中部位。2. 所有部位的S1'/S1比值约为0.5。另一方面，S2'/S2比值除中央部位外在其他部位均高于1，且在其他部位之间存在显著差异。3. 指出恢复百分比比恢复率更适合用于解释腭黏膜的黏弹性恢复。
