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Energy absorptive properties of human trabecular bone specimens during axial compression.

, , and . J Orthop Res, 7 (3): 432--439 (1989)
DOI: 10.1002/jor.1100070316

Abstract

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).

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