生体内椎間板矢状面に生じるひずみ分布

概要

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A Clarification of the mechanical causes for low-back pain requires a knowledge of the states of stress and/or strain throughout the thoraco-lumbar spine. However, the deformation behavior of an intervertebral disc in vivo has not been investigated sufficiently. This paper presents a new method to evaluate the state of strain occurring on the sagittal plane of an intervertebral disc in vivo under flexion and extension. That is, the displacement on the plane of a disc was measured by FCR (Fuji computer radiography) at the medical hospital of Hokkaido University. The internal strain distribution of a disc was estimated by use of an isoparametric shape function introduced to express the deformation of a disc. Consequently, compressive strain at the anterior part of lumbar discs, and tensile strain at the posterior part were confirmed to occur in vivo under flexion. On the other hand, the strain distribution under extension was opposite to that under flexion.
一般社団法人日本機械学会の論文
1991-05-25