Hojyo S
Kanagawa Shigaku. 1989 Jun;24(1):182-206.
Cases of lower unilateral free end defect are the source of many problems in clinical dentistry. The denture design method most commonly used is cross arch stabilization which involves creating a retainer on the side opposite the defect via a bar in order to stabilize the denture and protect the retaining teeth. Almost all research on this method involves experiments using a static load. Moreover, there are few studies that attempt to clarify the relationship between the major connector and the retaining teeth. As a means of clarifying these problems, the authors used the modal analysis method and a vibrometer, both of which have proven effective in general observation of lowr denture dynamics when dynamic force is applied. This allowed them to see the relationship between the metal framework configuration and the retainer in animation and thereby study displacement quantity and damping quantity. The following interesting were obtained. 1. There were four modes detected for fixed vibration on the individual metal frameworks: 500Hz band, 1kHz band 2kHz band and 4kHz band. 2. The dynamics of the individual metal frameworks were as follows: Mode 1 was a rigid body mode in a vertical direction with a fulcrum of angle 54. Mode 2 was a horizontal rigid body mode with a fulcrum of angle 54. Mode 3 was a mixture of a horizontal rigid bode and horizontal bend mode. There was a rolling type mode observed only from the plate type. Mode 4 consisted mainly of a horizontal bend mode. This showed that there were differences among the various modes. 3. Judging from the displacement rate computed at the 500Hz band, the rate of displacement decreases as the thickness and ratio decrease. 4. Judging from linear damping quantity and damping quantity in terms of frequency, the finishing line showed a greater tendency toward resonance. 5. Analysis in terms of vibratory science using modal analysis and octave band analysis hinted at the significance of cross arch stabilization.
单侧游离端缺失病例是口腔临床中诸多问题的根源。最常用的义齿设计方法是跨弓稳定法，即通过连接杆在缺损对侧制作固位体，以稳定义齿并保护基牙。几乎所有关于该方法的研究都采用静态加载实验。此外，很少有研究试图阐明大连接体与基牙之间的关系。为了阐明这些问题，作者采用了模态分析法和振动计，这两种方法在施加动态力时对下颌义齿动力学的一般观察中均已证明有效。这使他们能够在动画中观察金属支架结构与固位体之间的关系，从而研究位移量和阻尼量。得到了以下有趣的结果。1. 在各个金属支架上检测到四种固定振动模式：500Hz频段、1kHz频段、2kHz频段和4kHz频段。2. 各个金属支架的动力学情况如下：模式1是以54°角为支点的垂直方向刚体模式。模式2是以54°角为支点的水平刚体模式。模式3是水平刚体和水平弯曲模式的混合。仅在板式支架中观察到滚动式模式。模式4主要由水平弯曲模式组成。这表明不同模式之间存在差异。3. 从500Hz频段计算的位移率来看，随着厚度和比例的减小，位移率降低。4. 从线性阻尼量和频率方面的阻尼量来看，修整线显示出更大的共振趋势。5. 使用模态分析和倍频程带分析的振动科学分析暗示了跨弓稳定的重要性。
