“…Cyclic loading induced damage accumulation is also reported to weaken vertebrae (Burr et al, 1997) and is often associated with loosening of implants (Bauer and Schils, 1999). Whereas the fatigue strength of cortical bone is extensively reported in the literature (Carter et al, 1981;Zioupos and Casinos, 1998;Yeni and Fyhrie, 2002;O'Brien et al, 2003;Taylor et al, 2003;George and Vashishth, 2006) few data are available for trabecular bone (Moore and Gibson, 2003;Haddock et al, 2004;Yamamoto et al, 2006;Dendorfer et al, 2006). Most studies concentrate on bovine and human trabecular bone specimens cored in the main (onaxis) direction and analysed in cyclic compression.…”