Lower cervical spine facet cartilage thickness mapping

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Presentation transcript:

Lower cervical spine facet cartilage thickness mapping W. Womack, B.S., D. Woldtvedt, C.M. Puttlitz, Ph.D. Osteoarthritis and Cartilage Volume 16, Issue 9, Pages 1018-1023 (September 2008) DOI: 10.1016/j.joca.2008.01.007 Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 Facets were serially sectioned, dyed with 1% Toluidine Blue solution, and digitally photographed. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Mapping of osteochondral interface and facet surface. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 Ovoid perimeter fit for a representative facet. Geometric center, ovoid centerline, and location of maximum thickness (cylindrical coordinate reference) noted. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 4 Cartilage thickness distribution and fit for a representative facet, where tmax=1.00mm and k=0.48, as a function of rratio (left) and mapped in three dimensions (right, thickness scale magnified). Color surface and dots represent measured data and the black grid represents the analytical thickness fitting function. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 5 Facet widths by level (mean±standard error). Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 6 Perimeter shapes for facets with ML (abscissa) and AP (ordinate) widths of 12mm and 9mm, respectively, showing the range of lateral shifts δL for the superior facets (mean±1 standard deviation). Lateral shifts of 21%, 8% (average shape), and −6% are depicted (left to right). Lateral edge is on the left. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 7 Range of thickness distributions due to variation in the value of k (mean±1 standard deviation), when tmax=1.06mm. Reduced values for k represent flatter thickness distributions. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 8 Mean and peak facet cartilage thicknesses by level, with standard error. Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 9 Thickness distribution fit parameter k, with standard error. No significant differences were observed between inferior and superior facets overall, although differences were observed at the C3 and C4 levels (P=0.04 and P=0.05, respectively). Osteoarthritis and Cartilage 2008 16, 1018-1023DOI: (10.1016/j.joca.2008.01.007) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions