Harrison A, Huggett R, Handley R W
J Biomed Mater Res. 1979 Jan;13(1):23-34. doi: 10.1002/jbm.820130105.
This investigation studies the relationship of hardness, elastic modulus and scratch width as dependent variables to the abrasion resistance of twenty-three dental acrylic resins. The multiple correlation R, when all three variables are used as predictors, is 0.727. Because of the significant intercorrelations between the variables themselves a stepwise multiple regression analysis showed hardness as a redundant variable. Abrasive wear can be estimated from the following equation Abrasive wear = 806.1 - 0.1498 modulus + 0.681 scratch width (R = 0.725; standard deviation of estimate +/- 50.8) The deletion of scratch width does not appreciably reduce the standard deviation of the estimate: Abrasive wear = 1063.4 - 0.2055 modulus (r = 0.683; standard deviation of estimate +/- 50.3) The method of curing the specimens conformed to the respective manufacturers' instructions. Abrasion and scratch tests were performed using methods developed by the authors and previously described in the literature, whereas the hardness and elastic modulus results were devised from standard test procedures. Further research is currently in progress to improve the predictive power of abrasion resistance with additional new variables.
本研究探讨了硬度、弹性模量和划痕宽度作为因变量与23种牙科丙烯酸树脂耐磨性之间的关系。当将这三个变量都用作预测因子时，多重相关系数R为0.727。由于变量之间存在显著的相互相关性，逐步多元回归分析表明硬度是一个冗余变量。磨料磨损可通过以下方程估算：磨料磨损 = 806.1 - 0.1498×模量 + 0.681×划痕宽度（R = 0.725；估计标准偏差±50.8）。去除划痕宽度并不会显著降低估计的标准偏差：磨料磨损 = 1063.4 - 0.2055×模量（r = 0.683；估计标准偏差±50.3）。标本的固化方法符合各自制造商的说明。磨损和划痕测试采用作者开发并先前在文献中描述的方法进行，而硬度和弹性模量结果则根据标准测试程序得出。目前正在进行进一步的研究，以通过增加新变量来提高耐磨性的预测能力。
