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  • Title: Which portion in a facet is specifically affected by articular cartilage degeneration with aging in the human lumbar zygapophysial joint?
    Author: Tanno I, Oguma H, Murakami G, Sato S, Yamashita T.
    Journal: Okajimas Folia Anat Jpn; 2003 May; 80(1):29-34. PubMed ID: 12858963.
    Abstract:
    Using 10 osteoligamentous vertebral columns obtained from elderly donated cadavers, we describe in detail degenerative changes of the articular cartilage in lumbar zygapophysial joints to show which portion in a facet is specifically affected. Degenerative changes, including extended cartilage defects, occurred in multiple facets of every specimen. The results demonstrated 5 basic morphologies of degeneration, i.e., 1) marginal dominace in the articular surface, 2) lower segment dominance except for the lowest (L5/S) facet, 3) advancement in the inferior articular process, 4) cranial and caudal dominance rather than the dorsal dominance in the articular surface and 5) progress in a mirror-image manner. These rules seemed to be consistent with differences in size, shape and kinesiological aspects of the facet between segments and between portions in a facet.
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