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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Won-Joong (Departments of Orthopedic Surgery, Wooridul Spine Hospital) Lee, Sang-Ho (Departments of Neurosurgery, Wooridul Spine Hospital) Shin, Song-Woo (Departments of Neurosurgery, Wooridul Spine Hospital) Rivard, Charles H. (Department of Neurosurgery, Research Center, St. Justine Hospital) Coillard, Christine (Department of Neurosurgery, Research Center, St. Justine Hospital) Rhalmi, Souad (Department of Neurosurgery, Research Center, St. Justine Hospital)
저널정보
대한신경외과학회 대한신경외과학회지 대한신경외과학회지 제37권 제5호
발행연도
2005.1
수록면
364 - 369 (6page)

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Objective: Spinal instrumentation without fusion often fails due to biological failure of intervertebral joints (spontaneous fusion, degeneration, etc). The purpose of this study is to investigate the influence of fixation rigidity on viability of intervertebral joints. Methods: Twenty pigs in growing period were subjected to posterior segmental fixation. Twelve were fixed with a rigid fixation system(RF) while eight were fixed with a flexible unconstrained implant(FF). At the time of the surgery, a scoliosis was created to monitor fixation adequacy. The pigs were subjected to periodic radiological examinations and 12pigs (six in RF, six in FF) were euthanized at 12-18months postoperatively for analysis. Results: The initial scoliotic curve was reduced from $31{\pm}5^{\circ}$ to $27{\pm}8^{\circ}$ in RF group (p=0.37) and from $19{\pm}4^{\circ}$ to $17{\pm}5^{\circ}$ in FF group (p=0.21). Although severe disc degeneration and spontaneous fusion of facet joints were observed in RF group, disc heights of FF group were well maintained without major signs of degeneration. Conclusion: The viability of the intervertebral joints depends on motion spinal fixation. Systems allowing intervertebral micromotion may preserve the viability of intervertebral discs and the facet joint articular cartilages while maintaining a reasonably stable fixation.

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