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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 425 - 429 (5page)
이용수
초록· 키워드
오류제보하기
Objective : Rod-screw fixation systems are widely used for spinal instrumentation. Although many biomechanical studies on rod-screw systems have been carried out, but the effects of rod contouring on the construct strength is still not very well defined in the literature. This work examines the mechanical impact of straight, $20^{\circ}$ kyphotic, and $20^{\circ}$ lordotic rod contouring on rod-screw fixation systems, by forming a corpectomy model. Methods : The corpectomy groups were prepared using ultra-high molecular weight polyethylene samples. Non-destructive loads were applied during flexion/extension and torsion testing. Spine-loading conditions were simulated by load subjections of 100 N with a velocity of $5mm\;min^{-1}$, to ensure 8.4-Nm moment. For torsional loading, the corpectomy models were subjected to rotational displacement of $0.5^{\circ}\;s^{-1}$ to an end point of $5.0^{\circ}$, in a torsion testing machine. Results : Under both flexion and extension loading conditions the stiffness values for the lordotic rod-screw system were the highest. Under torsional loading conditions, the lordotic rod-screw system exhibited the highest torsional rigidity. Conclusion : We concluded that the lordotic rod-screw system was the most rigid among the systems tested and the risk of rod and screw failure is much higher in the kyphotic rod-screw systems. Further biomechanical studies should be attempted to compare between different rod kyphotic angles to minimize the kyphotic rod failure rate and to offer a more stable and rigid rod-screw construct models for surgical application in the kyphotic vertebrae.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
Alkalay RN / 2005 / A biomechanical analysis of an instrumented spinal fixator under torsional loads / J Biomech 38:865~876
Baaj AA / 2011 / Biomechanical advantage of the index-level pedicle screw in unstable thoracolumbar junction fractures / J Neurosurg Spine 14:192~197
Belmont PJ Jr / 2011 / The effects of hook pattern and kyphotic angulation on mechanical strength and apical rod strain in a long-segment posterior construct using a synthetic model / Spine 26:627~635
Chen PQ / 2003 / Mechanical performance of the new posterior spinal implant : effect of materials, connecting plate, and pedicle screw design / Spine 28:881~886
Chen WJ / 2004 / The effect of sagittal alignment on adjacent joint mobility after lumbar instrumentation--a biomechanical study of lumbar vertebrae in a porcine model / Clin Biomech (Bristol, Avon) 19:763~768
Baaj AA / 2011 / Biomechanical advantage of the index-level pedicle screw in unstable thoracolumbar junction fractures / J Neurosurg Spine 14:192~197
Belmont PJ Jr / 2011 / The effects of hook pattern and kyphotic angulation on mechanical strength and apical rod strain in a long-segment posterior construct using a synthetic model / Spine 26:627~635
Chen PQ / 2003 / Mechanical performance of the new posterior spinal implant : effect of materials, connecting plate, and pedicle screw design / Spine 28:881~886
Chen WJ / 2004 / The effect of sagittal alignment on adjacent joint mobility after lumbar instrumentation--a biomechanical study of lumbar vertebrae in a porcine model / Clin Biomech (Bristol, Avon) 19:763~768
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