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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

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학술저널
저자정보
Kim, Jin-Myung (Department of Medical System Engineering and Mechatronics, Gwangju Institute of Science and Technology) Shin, Dong Ah (Department of Medical System Engineering and Mechatronics, Gwangju Institute of Science and Technology) Byun, Dong-Hak (Department of Medical System Engineering and Mechatronics, Gwangju Institute of Science and Technology) Kim, Hyung-Sun (Department of Medical System Engineering and Mechatronics, Gwangju Institute of Science and Technology) Kim, Sohee (Department of Medical System Engineering and Mechatronics, Gwangju Institute of Science and Technology) Kim, Hyoung-Ihl (Department of Medical System Engineering and Mechatronics, Gwangju Institute of Science and Technology)
저널정보
대한신경외과학회 대한신경외과학회지 대한신경외과학회지 제52권 제5호
발행연도
2012.1
수록면
435 - 440 (6page)

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Objective : The purpose of this study is to find the optimal stiffness and volume of bone cement and their biomechanical effects on the adjacent vertebrae to determine a better strategy for conducting vertebroplasty. Methods : A three-dimensional finite-element model of a functional spinal unit was developed using computed tomography scans of a normal motion segment, comprising the T11, T12 and L1 vertebrae. Volumes of bone cement, with appropriate mechanical properties, were inserted into the trabecular core of the T12 vertebra. Parametric studies were done by varying the volume and stiffness of the bone cement. Results : When the bone cement filling volume reached 30% of the volume of a vertebral body, the level of stiffness was restored to that of normal bone, and when higher bone cement exceeded 30% of the volume, the result was stiffness in excess of that of normal bone. When the bone cement volume was varied, local stress in the bony structures (cortical shell, trabecular bone and endplate) of each vertebra monotonically increased. Low-modulus bone cement has the effect of reducing strain in the augmented body, but only in cases of relatively high volumes of bone cement (>50%). Furthermore, varying the stiffness of bone cement has a negligible effect on the stress distribution of vertebral bodies. Conclusion : The volume of cement was considered to be the most important determinant in endplate fracture. Changing the stiffness of bone cement has a negligible effect on the stress distribution of vertebral bodies.
#Finite element analysis #Bone cements #Vertebroplasty

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참고문헌 (20)

참고문헌 신청
Adams MA / 2002 / The Biomechanics of Back Pain / Churchill Livingstone :100 google schola Anselmetti GC / 2011 / Percutaneous vertebroplasty in osteoporotic patients : an institutional experience of 1,634 patients with long-term follow-up / J Vasc Interv Radiol 22:1714~1720 google schola Aquarius R / 2011 / The fracture risk of adjacent vertebrae is increased by the changed loading direction after a wedge fracture / Spine 36:408~412 google schola Bae H / 2012 / A prospective randomized FDA-IDE trial comparing Cortoss with PMMA for vertebroplasty : a comparative effectiveness research study with 24-month follow-up / Spine 37:544~550 google schola Baroud G / 2003 / Biomechanical explanation of adjacent fractures following vertebroplasty / Radiology 229:606~608 google schola

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