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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European spine journal 2 (1993), S. 16-21 
    ISSN: 1432-0932
    Keywords: Plateau vertébral ; Compression ; Francture ; Vertèbre ; End-plate ; Compression ; Fracture ; Vertebra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The instantaneous displacement and creep of the caudal end-plate were measured during compression of six segments of cadaveric lumbar spine. Each segment consisted of a disc attached to the two adjacent vertebrae. It was subjected to an applied load of 1.6 kN which was supposed to be within the normal physiological range. End-plate displacement was measured using a displacement transducer. When the load was applied there was an almost instantaneous displacement of the end-plate of 0.14±0.04mm (mean±standard deviation). The creep displacement in the speciments which remained undamaged was very small (0.023±0.006mm) and associated with a retardation time of 1.9±1.1s, i.e. the end-plate displacement in these specimens reached an equilibrium value within a few minutes. Appreciable end-plate displacement (exceeding 4 mm) was associated with damage which included fracture of the trabecular bone. In the damaged specimen, the end-plate continued to displace under a constant load. This result suggests that sustained compression could aggravate mechanical damage to the vertebra and end-plate in vivo.
    Notes: Résumé Le déplacement instantané et le glissement du plateau inférieur lors de la mise en compression, ont été mesurés sur six segments mobiles de rachis lombaires cadavériques. Chaque segment était constitué d'un disque attaché aux deux vertèbres adjacentes. Il a été soumis à une charge de 1,6kN, supposée être dans les limites des valeurs des charges physiologiques. Le déplacement du plateau a été mesuré en utilisant un capteur de déplacement. Lorsque la charge était appliquée, il y avait un déplacement presque instantané du plateau de l'ordre de 0,14±0,04mm (moyenne±écart-type). Le déplacement relevé sur les spécimens restés intacts était très faible (0,023±0,006 mm) et associé à un délai de 1,9±1,1s, ce qui signifie que le déplacement du plateau a atteint en quelques minutes une valeur d'équilibre. Un déplacement appréciable du plateau (supérieur à 4mm) était associé à des lésions comportant une fracture de l'os trabéculaire. Sur les spécimens endommagés, le plateau a continué à se déplacer sous l'action d'une charge constante. Ce résultat suggère qu'une compression maintenue pourrait aggraver in vivo les lésions mécaniques vertébrales au niveau des plateaux.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 17 (1998), S. 367-368 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 17 (1998), S. 367-368 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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