Table 1.

Friction as a function of IFLS. Linear regression model parameters (±standard deviation) for the μ-IFLS relationships (Fig. 5) for all the articulation velocities. BSF = bovine synovial fluid, Deg.=degraded, i.e., chondroitinase ABC treated group.

Effective velocity	1.5 mm/s	4.4 mm/s	15 mm/s	44 mm/s
Saline
μIFLS	−0.15 ± 0.03	-0.14 ± 0.03	-0.08 ± 0 04	-0.07 ± 0.02
μ 0	0.11 ± 0.02	0.1 ± 0.02	0.06 ± 0.03	0.06 ± 0.02
R 2	0.9987 ± 0.0002	0.9989 ± 0.0004	0.9993 ± 0.0002	0.9993 ± 0.0001
BSF
μ IFLS	-0.08 ± 0.03	-0.07 ± 0.01	-0.07 ± 0.01	-0.06 ± 0.01
μ 0	0.07 ± 0.02	0.06 ± 0.01	0.06 ± 0.01	0.06 ± 0.01
R 2	0.9984 ± 0.0006	0.9989 ± 0.0004	0.9992 ± 0.0004	0.9991 ± 0.0003
Deg. Saline
μ IFLS	-0.08 ± 0.02	-0.13 ± 0.02	-0.08 ± 0.01	-0.07 ± 0.01
μ 0	0.05 ± 0.01	0.09 ± 0 01	0.06 ± 0	0.06 ± 0.01
R 2	0.9936 ± 0.0006	0.9953 ± 0.0013	0.9963 ± 0.001	0.9966 ± 0.0014
Deg. BSF
μ IFLS	-0.04 ± 0.04	-0.08 ± 0.03	-0.03 ± 0.02	-0.06 ± 0.02
μ 0	0.04 ± 0.02	0.06 ± 0.02	0.03 ± 0.01	0.05 ± 0.02
R2	0.9945 ± 0.0017	0.9956 ± 0.0012	0.9965 ± 0.0012	0.9964 ± 0.0019