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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).