Development of a prosthetic intervertebral disc

Casey K. Lee, Noshir Langrana, John R. Parsons, Mark C. Zimmerman

Research output: Contribution to journalArticle

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Abstract

This article is a preliminary report of a 10-year investigation of the development of an intervertebral disc prosthesis. Spinal fusion is a method for the treatment of chronic, disabling low-back pain that does not respond to nonop-erative treatments. Spinal fusion, however, has various adverse effects, and the results of spinal fusion are often unpredictable. The goal of this research project was to develop disc prostheses that have mechanical properties very similar to those of natural, normal discs. Two types of disc prosthesis, one with fiber-reinforced polyurethane and the other with multicomponent, non-fiber-reinforced polymers (C-Flex), have been designed and manufactured. The fiber-reinforced disc was made of polyurethane end-plates with A100 hardness, a homogenous nucleus with A40, and 12 layers of multidirectional (0, +45°), fiber-reinforced anulus with A40 polyurethane. The design and modeling of the multicomponent polymers (non-fiber-reinforced) was made of C-Flex end- plates with A90 hardness, a nucleus with A35 occupying 35% of the volume, and an anulus with 70A. Mechanical testing of these disc prostheses demonstrated similar mechanical properties to those of natural, normal discs.

Original languageEnglish (US)
Pages (from-to)S253-S255
JournalSpine
Volume16
Issue number6S
StatePublished - Jan 1 1991

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All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine
  • Clinical Neurology

Keywords

  • Intervertebral disc prosthesis
  • Lumbar spine
  • Lumbar spine biomechanics

Cite this

Lee, C. K., Langrana, N., Parsons, J. R., & Zimmerman, M. C. (1991). Development of a prosthetic intervertebral disc. Spine, 16(6S), S253-S255.