title: Lumbo-sacral zygapophyseal joint tropism and its effect on hyaline cartilage.
abstract: Paired left and right lumbo-sacral zygapophyseal joint cartilage area and thickness are compared histologically in four cases with joint tropism and a control group of four cases showing less than 5 degrees of tropism. The more sagittally orientated facets in tropism show greater loss of hyaline cartilage with accompanying evidence of osteoarthritis.
authors.affiliation: Department of Anatomy and Human Biology, The University of Western Australia, Nedlands, 6009, Western Australia, Australia.
authors.forename: L G
authors.initials: LG
authors.lastname: Giles