지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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This research was aimed to analyze load sharing ratios between cortical shell and trabecular bone of a degraded lumbar vertebra with aging, and also evaluate elastic moduli assigned into an FE model, using finite element method. For the better analysis of trabecular bone, effective elastic moduli, that is, nominal elastic moduli divided by the volumetric porosities was used. The elastic moduli of the cortical shell suitable for the trabecular bone were obtained from the equations on the basis of idealized stress-strain relations, including areal porosities. To minimize numerical errors, p-element was used. Using eight parameters that refer to some published papers, the geometry of L3 with a removed posterior part. After the constant compressive displacement was applied, the load sharing ratios were obtained by using both every elastic strain energy and every vertical force between two bones in each 8-volume.
As results, 1) according to an increase in age from 20-year to 80-year, load sharing ratios of trabecular bone decreased from 55% to 49%; 2) the maximal ratios of each bone were occurred in the mid-plane of centrums and the endplate of cortical shells, respectively; 3) effective elastic moduli assigned into a porous centrum /cortex were found to be adequate; 4) for load sharing ratios, the difference of two methods showed that the total ratios were almost same within less than 1% but the partial ratios at every depth were more or less different each other.
목차
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참고문헌 (51)
참고문헌 신청
W. J. Whitehouse / 1971 / The scanning electron microscope in studies of trabecular bone from a human vertebral body / J Anat 108(Pt 3):481~496
L. Mosekilde / 1989 / Sex differences in age-related loss of vertebral trabecular bone mass and structure--biomechanical consequences / Bone 10(6):425~432
S. F. Evans / 1993 / Vertebral morphometry in women aged 50-81years / Bone Miner 21(1):29~40
L. Mosekilde / 1986 / Normal vertebral body size and compressive strength : relations to age and to vertebral and iliac trabecular bone compressive strength / Bone 7(3):207~212
A. Vesterby / 1991 / Biologically meaningful determinants of the in vitro strength of lumbar vertebrae / Bone 12(3):219~244
L. Mosekilde / 1989 / Sex differences in age-related loss of vertebral trabecular bone mass and structure--biomechanical consequences / Bone 10(6):425~432
S. F. Evans / 1993 / Vertebral morphometry in women aged 50-81years / Bone Miner 21(1):29~40
L. Mosekilde / 1986 / Normal vertebral body size and compressive strength : relations to age and to vertebral and iliac trabecular bone compressive strength / Bone 7(3):207~212
A. Vesterby / 1991 / Biologically meaningful determinants of the in vitro strength of lumbar vertebrae / Bone 12(3):219~244
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