Catović A M
University of Zagreb, Croatia.
Quintessence Int. 1992 Jun;23(6):435-8.
The aim of this study was to obtain some data on the dynamic strength of premolar teeth. Experiments were performed on three groups of human premolars: intact teeth, teeth prepared for partial veneer crowns with flat occlusal surfaces, and teeth prepared for partial veneer crowns with rounded occlusal surfaces. The loading procedure was performed in a modified Amslers high-frequency pulsator. The greatest dynamic strength was exhibited by the intact specimens. The highest continual (unlimited number of loading cycles) dynamic stress withstood by all three groups of premolars was about 300 N. A statistically significant negative correlation was found between Fmax and the number of cycles in all three tested groups.
本研究的目的是获取一些关于前磨牙动态强度的数据。对三组人类前磨牙进行了实验：完整牙齿、制备了具有平坦咬合面的部分贴面冠的牙齿以及制备了具有圆形咬合面的部分贴面冠的牙齿。加载过程在改良的阿姆斯特朗高频脉动器中进行。完整标本表现出最大的动态强度。所有三组前磨牙承受的最高连续（无限加载循环次数）动态应力约为300 N。在所有三个测试组中，Fmax与循环次数之间发现了具有统计学意义的负相关。
