Chitchumnong P, Brooks S C, Stafford G D
Dent Mater. 1989 Jan;5(1):2-5. doi: 10.1016/0109-5641(89)90082-1.
Flexural failure of denture-base materials is considered the primary mode of clinical failure. However, there are several methods of conducting flexural tests, and none has been demonstrated to be the most appropriate. Three- and four-point bend-testing were compared, with four different dental polymers used. The values for modulus of elasticity determined by the two tests were not statistically different. However, the values for flexural strength from the three-point bend test were always greater, suggesting that that parameter is dependent on the testing procedure. Modifications to the existing denture-base material specification are suggested.
义齿基托材料的弯曲失效被认为是临床失效的主要模式。然而，进行弯曲测试有几种方法，且没有一种方法被证明是最合适的。对使用四种不同牙科聚合物的三点和四点弯曲测试进行了比较。通过这两种测试确定的弹性模量值在统计学上没有差异。然而，三点弯曲测试的弯曲强度值总是更大，这表明该参数取决于测试程序。建议对现有的义齿基托材料规范进行修改。
