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by paulsuman on June 3rd, 2009

paulsuman

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What do you mean by wedge compression of L2 vertebral body with altered marrow signals

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  • by nzguy.. on June 8th, 2009

    nzguy..

    Vertebral compression fractures characteristically demonstrate a wedge-shaped pattern with gross collapse of the anterior portion of the vertebral body and relative preservation of the posterior body height. A second common form of fracture is a central crush fracture that may frequently occur in the lower lumbar spine. Cortical and trabecular bone loss, as well as disruption of the micro-architecture of bone, are all typical of osteoporosis. Spinal flexion and axial compression have been shown to place maximal stress on the superior end plate of the vertebral body. The asymmetry of the vertebral body produces maximal stress at the anterior aspect of the cortical shell. A combination of these factors, that is, decreased, asymmetric, and irregular bone density, is a hallmark of osteoporotic bone loss. Coupled with even minimal flexion and/or axial loading, these factors predispose the osteoporotic vertebrae to wedge-shaped compression fractures, acquired kyphosis, and general height loss.

    Once 1 vertebral compression fracture has occurred, a bio mechanical environment is created that favors additional fractures. This occurs as a result of the vertebral compression fracture causing an additional kyphosis, shifting the patient's center of gravity anteriorly and producing a longer moment arm. This longer moment arm increases kyphotic angulation and places additional stress on the vertebrae, particularly the vertebrae adjacent to the primary fracture.

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