Fig. 6From: Surface damage of bovine articular cartilage-off-bone: the effect of variations in underlying substrate and frequencyMean crack length plotted with substrate density at 1, 10 and 50Â Hz for off-bone articular cartilage, represented by the square, circle and diamond, respectively. Linear regression displayed by eq. (1) fit the data at R2 values of 0.485, 0.909 and 0.524 at 1, 10 and 50Â Hz, respectively. Error bars represent standard deviationsBack to article page