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Lumbar and cervical viscoelastic disc replacement: Concepts and current experience

Authors
  • Lazennec, Jean Yves
Type
Published Article
Journal
World Journal of Orthopedics
Publisher
Baishideng Publishing Group Co (World Journal of Orthopedics)
Publication Date
Aug 18, 2020
Volume
11
Issue
8
Pages
345–356
Identifiers
DOI: 10.5312/wjo.v11.i8.345
PMID: 32904082
PMCID: PMC7448204
Source
PubMed Central
Keywords
License
Green

Abstract

The ideal lumbar and cervical discs should provide six degrees of freedom and tri-planar (three-dimensional) motion. Although all artificial discs are intended to achieve the same goals, there is considerable heterogeneity in the design of lumbar and cervical implants. The “second generation total disc replacements” are non-articulating viscoelastic implants aiming at the reconstruction of physiologic levels of shock absorption and flexural stiffness. This review aims to give an overview of the available implants detailing the concepts and the functional results experimentally and clinically. These monobloc prostheses raise new challenges concerning the choice of materials for the constitution of the viscoelastic cushion, the connection between the components of the internal structure and the metal endplates and even the bone anchoring mode. New objectives concerning the quality of movement and mobility control must be defined.

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