Stiffness and strain energy criteria to evaluate the threshold of injury to an intervertebral joint.
Stiffness and strain energy criteria to evaluate the threshold of injury to an intervertebral joint.
复制标题
评估椎间关节损伤阈值的刚度和应变能标准。
DOI：
10.1016/0021-9290(89)90036-5
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发表时间：
1989
影响因子：
2.4
通讯作者：
A. Sances
中科院分区：
文献类型：
--
作者：
N. Yoganandan;G. Ray;F. Pintar;J. Myklebust;A. Sances
本研究的重点是评估损伤的阈值椎间关节的基础上，其机械响应。椎间关节的载荷-挠度行为表明具有连续变化刚度（承受外力能力的测量）的非线性和S形特征。根据经典力学理论，将零刚度点所对应的载荷确定为最大承载能力。此外，创伤的开始被定义为发生在载荷-挠度曲线上刚度第一次开始降低的点。测定了正常和退变椎间关节在创伤初期的载荷、刚度和能量吸收能力，对9个新鲜男尸椎间关节进行了轴向压缩载荷实验，并利用导数原理将载荷-挠度响应转化为刚度-挠度响应。能量特性也被导出。发现创伤开始时的载荷、刚度和能量对于正常节段分别为9.0 kN、2850 N mm−1和10.2 J，对于退化节段分别为4.4 kN、1642 N mm−1和5.8 J。正常椎间关节的失效载荷和能量值分别为11.0 kN和18.0 J，退变椎间关节的失效载荷和能量值分别为5.3 kN和5.7 J。
This study is focused to evaluate the threshold of injury to an intervertebral joint based on its mechanical response. The load-deflection behavior of the intervertebral joint indicated non-linear and sigmoidal characteristics with continuously changing stiffness (a measure of the ability to withstand external force). The load corresponding to the point of zero stiffness was identified, according to the classical theories of mechanics, as the maximum load carrying capacity. Further, the initiation of trauma was defined to occur at the point on the load-deflection curve at which the stiffness begins to decrease for the first time. The load, stiffness and energy absorbing capabilities of normal and degenerated intervertebral joints at the initiation of trauma was determined.Axial compressive load experiments were conducted on nine intervertebral joints of fresh human male cadavers and the resulting load-deflection responses were transformed into stiffness-deflection responses using the derivative principle. Energy characteristics were also derived. Load, stiffness and energy at the initiation of trauma were found to be 9.0 kN, 2850 N mm−1, and 10.2 J for normal and 4.4 kN, 1642 N mm−1, and 5.8 J for degenerated segments, respectively. The load and energy values at failure were 11.0 kN, and 18.0 J for normal and 5.3 kN and 5.7 J for degenerated intervertebral joints, respectively.
影响因子：
4.8
作者：
PANJABI, MM;WHITE, AA
通讯作者：
WHITE, AA
DOI：
10.1115/1.3138347
发表时间：
1982-01-01
影响因子：
1.7
作者：
REUBER, M;SCHULTZ, A;SPENCER, D
通讯作者：
SPENCER, D