機械的荷重による腰部椎間板の変化に関する実験的研究

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概要

• 論文の詳細を見る

• As part of the studies on the abnormality of the lumbar intervertebral disk which is an important factor in the development of low back or sciatic pain, experiments were carried out in the disks removed from 47 fresh corpses to study from dynamic and diskographic viewpoints various changes in the disks caused by the application of a variety of pressures, such as simple pressing, repeated pressing, twisting and puncturing. The following observations were made: 1. The lower the postition of the disk, the less elastic it was dynamically. Diskograms revealed a high degree of degeneration in the lower lumbar intervertebral disk. These observations seem to be related to a higher clinical incidence of herniation of nucleus pulposus in the lower disk. 2. Pressing and twisting caused herniation of nucleus pulyosus to develop in a very small number of specimens, but a high degree of degeneration occurred in many specimens as the result of the same tests. The latter specimens showed "a condition which will eventually turn into hernia" if some other stimulus is applied. 3. Torsional force was shown to be an important factor in the development of degeneration it the lumbar intervertebral disk. When a slight degree of degeneration has occurred in a part of the disk, the particular part bore the brunt of torsional force, causing the degeneration to become intensified and the torional force to be concentrated more and more on that part-thus a vicious circle was established. 4. It was presumed teat herniation of nucleus pulposus would not result merely from a simple, temporary injury to the disk, but that fatigue and ensuing destruction of the annulus fibrosus by a constant mechanical stimulation of a long standing would cause protrusion of the nucleus pulposus. 5. By means of an experimental diskographic study of the superoinferior or sectional view of the disk, the data which will help read clinical diskograms have been obtained, and the pictures of anterior herniation have been divided into several groups.

• 千葉大学の論文

著者

• 小川 源太郎

  千葉大学医学部整形外科

• 小川 源太郎

  小川病院

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