Energy absorptive properties of human trabecular bone specimens during axial compression.
Human trabecular bone specimens (n = 121) from the proximal tibial epiphysis of nine macroscopically normal cadaver knees were tested nondestructively to a fixed strain (0.6%) for analysis of unloading energy and hysteresis energy followed by a destructive test for analysis of work to failure. All energy properties showed interindividual variation (p less than 0.005). There was a strong positive correlation between unloading energy and both stress (r = 0.95) and stiffness (r = 0.89) determined at 0.6% strain. A less strong, but statistically significant, correlation was found between hysteresis energy and stress (r = 0.82) and stiffness (r = 0.76) at 0.6% strain. There was a negative correlation between the loss tangent and stiffness at 0.6% strain (r = -0.40, p less than 0.001). Work to failure correlated positively with modulus of elasticity (r = 0.75), ultimate stress (r = 0.92), and ultimate strain (r = 0.51). There was a positive mutual correlation between all energy properties (p less than 0.001).
Linde
F
F
Orthopaedic Hospital, University of Aarhus, Denmark.
Hvid
I
I
Pongsoipetch
B
B
D000368:Aged; D000369:Aged, 80 and over; D001842:Bone and Bones / Q000032:analysis / Q000502:physiology*; D004548:Elasticity; D004735:Energy Transfer; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000502:physiology; D008297:Male; D008875:Middle Aged; D013314:Stress, Mechanical; D013977:Tibia