Clemens D, Galante J, Rostoker W
J Biomed Mater Res. 1979 May;13(3):437-41. doi: 10.1002/jbm.820130308.
Experimental tests demonstrate that there is a sharp drop in resistance to fatigue fracture when the grain size is increased from 75 to 150 micrometers. This is at least a partial explanation for fatigue fractures of the stems of total hip-joint prostheses reported in the literature. It is also shown that plastic strains associated with fatigue stressing increase with increasing grain size so that loosening of the bone cement embedment may also be part of the premature failure process.
实验测试表明，当晶粒尺寸从75微米增加到150微米时，抗疲劳断裂能力会急剧下降。这至少部分解释了文献中报道的全髋关节假体柄的疲劳骨折现象。研究还表明，与疲劳应力相关的塑性应变会随着晶粒尺寸的增加而增大，因此骨水泥植入物的松动也可能是过早失效过程的一部分。
