L. McCann, E. Ingham, Z. Jin, J. Fisher Osteoarthritis and Cartilage

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Presentation transcript:

Influence of the meniscus on friction and degradation of cartilage in the natural knee joint L. McCann, E. Ingham, Z. Jin, J. Fisher Osteoarthritis and Cartilage Volume 17, Issue 8, Pages 995-1000 (August 2009) DOI: 10.1016/j.joca.2009.02.012 Copyright © 2009 Terms and Conditions

Fig. 1 Pendulum friction simulator: schematic representation of the friction simulator hardware. Osteoarthritis and Cartilage 2009 17, 995-1000DOI: (10.1016/j.joca.2009.02.012) Copyright © 2009 Terms and Conditions

Fig. 2 Coefficient of friction over 3600 cycles for AC-vs-AC+meniscus and AC-vs-AC_meniscectomy at a peak load of 1,000N. Data presented as mean (n=6)±95% confidence intervals (CI). There was a statistical difference (P<0.05; ANOVA (Analysis of Variance) single factor+T-Method) between the mean coefficients of friction (averaged over the 3,600 cycles). Osteoarthritis and Cartilage 2009 17, 995-1000DOI: (10.1016/j.joca.2009.02.012) Copyright © 2009 Terms and Conditions

Fig. 3 Typical MRI images. (a) from the AC_AC_with meniscus group where there was no detectable change in wear volume at 78μm×78μm in-plane pixel resolution (b) the AC_AC_meniscectomy group where surface damage was detectable at 78μm×78μm in-plane pixel resolution and (c) a high resolution scan 20μm×20μm in-plane pixel resolution of an undamaged sample. Osteoarthritis and Cartilage 2009 17, 995-1000DOI: (10.1016/j.joca.2009.02.012) Copyright © 2009 Terms and Conditions

Fig. 4 Coefficient of friction over 3600 cycles for AC-vs-AC+meniscus and AC-vs-AC_meniscectomy, at a peak load of 250N. Data presented as mean (n=6)±95% CI. There was a statistical difference (P<0.02; ANOVA single factor+T-Method) between the mean coefficients of friction (averaged over the 3,600 cycles). Osteoarthritis and Cartilage 2009 17, 995-1000DOI: (10.1016/j.joca.2009.02.012) Copyright © 2009 Terms and Conditions

Fig. 5 Average friction shear stress vs cartilage wear volume, determined using μMRI scans. Data presented as mean (n=6)±95% CI. Osteoarthritis and Cartilage 2009 17, 995-1000DOI: (10.1016/j.joca.2009.02.012) Copyright © 2009 Terms and Conditions