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Table 1 Details of cartilage sites tested and summary of the results for storage modulus, loss modulus and phase angle

From: Viscoelastic properties of bovine articular cartilage attached to subchondral bone at high frequencies

Point Thickness (mm) Frequency range (Hz) Storage modulus curve fit Loss modulus (MPa) Phase angle (°)
    A (SE) B (SE) R 2 p Mean (SD) Mean (SD)
1 2.9 1 to 92 3.4 (0.2) 69.3 (0.5) 0.99 0 6.6 (0.6) 4.8 (0.2)
2 2.1 1 to 92 3.0 (0.2) 66.4 (0.7) 0.97 0 6.7 (0.3) 5.1 (0.5)
3 1.1 1 to 92 2.8 (0.3) 81.2 (1.0) 0.93 0 5.3 (0.5) 3.4 (0.5)
4 2.8 1 to 80 1.7 (0.2) 47.6 (0.8) 0.93 0.002 4.5 (0.8) 4.9 (0.7)
5 2.5 1 to 80 2.3 (0.3) 56.1 (0.8) 0.95 0.001 5.7 (0.5) 5.2 (0.4)
6 1.7 1 to 80 2.5 (0.2) 57.3 (0.7) 0.97 0 5.7 (0.3) 5.1 (0.6)
7 1.1 1 to 72 1.9 (0.2) 75.4 (0.5) 0.97 0 5.0 (0.7) 3.6 (0.7)
8 1.9 1 to 72 2.8 (0.2) 62.3 (0.5) 0.99 0 6.4 (0.4) 5.3 (0.7)
9 2.4 1 to 72 2.8 (0.2) 59.8 (0.6) 0.98 0 5.9 (0.3) 5.0 (0.3)
10 1.8 1 to 72 2.3 (0.04) 45.9 (0.1) 1.00 0 4.9 (0.3) 5.4 (0.8)
11 1.7 1 to 72 2.1 (0.1) 56.3 (0.3) 0.99 0 4.8 (0.3) 4.4 (0.2)
12 1.7 1 to 72 1.8 (0.06) 39.0 (0.2) 0.99 0 3.6 (0.2) 4.6 (0.2)
13 2.4 1 to 72 2.1 (0.1) 43.0 (0.3) 0.98 0 4.2 (0.3) 4.9 (0.2)
14 2.7 1 to 72 1.8 (0.1) 38.5 (0.4) 0.98 0 3.9 (0.2) 5.1 (0.2)
15 2.4 1 to 72 1.9 (0.07) 42.8 (0.2) 0.99 0 4.1 (0.2) 4.9 (0.2)
16 2.5 1 to 72 1.5 (0.1) 36.1 (0.3) 0.98 0 3.4 (0.4) 4.8 (0.3)
17 2.7 1 to 60 3.3 (0.2) 55.8 (0.6) 0.98 0 5.5 (0.3) 4.9 (0.3)
18 2.8 1 to 60 3.2 (0.2) 53.5 (0.5) 0.99 0 5.9 (0.4) 5.3 (0.5)
19 3.2 1 to 50 1.9 (0.2) 37.9 (0.4) 0.98 0 4.2 (0.3) 5.7 (0.3)
20 1.7 1 to 30 3.1 (0.2) 46.0 (0.5) 0.98 0 5.3 (0.3) 5.7 (0.1)
21 2.4 1 to 30 3.3 (0.3) 55.2 (0.7) 0.97 0 5.2 (0.3) 4.7 (0.2)
22 2.6 1 to 30 2.7 (0.2) 49.1 (0.5) 0.97 0 4.8 (0.2) 4.9 (0.2)
23 2.7 1 to 30 2.2 (0.2) 36.4 (0.4) 0.97 0 3.2 (0.2) 4.4 (0.1)
24 1.7 1 to 18 3.0 (0.2) 45.2 (0.4) 0.98 0 5.0 (0.2) 5.6 (0.6)
25 2.6 1 to 18 2.3 (0.1) 35.1 (0.2) 0.98 0 3.6 (0.2) 5.3 (0.1)
26 3.1 1 to 18 2.7 (0.2) 37.8 (0.4) 0.97 0 3.3 (0.2) 4.4 (0.1)
27 2.9 1 to 18 3.0 (0.2) 46.7 (0.4) 0.97 0 4.0 (0.2) 4.4 (0.1)
28 2.8 1 to 12 3.1 (0.2) 43.9 (0.3) 0.99 0 4.7 (0.1) 5.5 (0.3)
29 1.9 1 to 10 2.4 (0.3) 32.3 (0.6) 0.92 0.001 3.6 (0.1) 5.6 (0.3)
  1. The storage modulus is described by a line of the form E' = A log e (f) + B, where f represents frequency. SE is the standard error of the coefficients A and B. R 2 is a squared correlation coefficient and shows how well the line fits the data points. If p < 0.05 it indicates that the line is statistically significant. Loss modulus and phase angle results given as mean and standard deviation (SD).
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