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Knochen und Knochen-Zement-Belastungen in der thorakolumbalen Wirbelsäule nach Kyphoplastik

Eine Finite-Element-Studie

Der Orthopäde volume 33, pages 48–55 (2004)Cite this article

Zusammenfassung

Die vorliegende Studie quantifiziert die Belastungen in behandelten sowie unbehandelten Wirbelkörpern nach Kyphoplastik. Es wurden dreidimensionale (3D-) Finite-Element-Modelle humaner Wirbelkörper der Niveaus T11, T12, L1 und L2 zur Analyse der Belastungen innerhalb des Knochens und Knochenzements benutzt. Um den Einfluss einer Kyphoplastik auf den benachbarten Wirbelkörper zu simulieren, wurde ein validiertes Wirbelsäulensegment T12-L1 berechnet. Im Modell des einzelnen Wirbelkörpers hatten Änderungen des Knochenzementmoduls wenig Einfluss auf die Belastungen des Zements oder Knochens. Die Anwesenheit von Knochenzement hatte wenig Effekt auf die Größe oder Verteilung der Belastungen im benachbarten Wirbelkörper T12.

Diese Studie quantifiziert die Belastungen in Knochenzement und Knochen in Wirbelkörpern nach Kyphoplastik unter in-vivo-ähnlichen Bedingungen. Die Anwesenheit von Knochenzement scheint einen nur geringen Effekt auf die Belastungen im direkt benachbarten Wirbelkörper zu haben.

Abstract

The study quantified the stress levels in treated and untreated vertebral bodies following kyphoplasty. Three-dimensional FE models of treated and untreated T11, T12, L1, and L2 vertebral bodies were evaluated to examine the stress levels within the bone and bone cement. A validated T12-L1 model was used to investigate the effect of kyphoplasty treatment on adjacent vertebral stresses and strains. Using the single vertebral models, bone cement modulus changes had minimal effect on the stresses in the bone or the cement. The presence of bone cement had a minimal effect on the stress magnitudes or distribution in the adjacent T12 vertebra.

This study provides quantification of the stress levels in bone cement and bone in vertebral bodies treated with kyphoplasty under in vivo-like loading conditions. The presence of bone cement immediately following kyphoplasty has only a slight effect on the stress magnitudes or distributions in adjacent vertebrae.

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Danksagung

Diese Studie wurde durch Kyphon Inc. finanziell unterstützt. Wir möchten Herrn Prof. Tony Keaveny, UC Berkeley, für konstruktive Vorschläge zur Thematik danken.

Author information

Affiliations

  1. Exponent Inc., Philadelphia, USA

    L. M. Villarraga Ph.D., P. A. Cripton, A. J. Bellezza & S. M. Kurtz

  2. Kyphon Inc., Bordeaux Dr. Sunnyvale, USA, CA

    A. A. Edidin

  3. School of Biomedical Engineering Science and Health Systems, Drexel University, Philadelphia, USA

    L. M. Villarraga Ph.D., P. A. Cripton, S. M. Kurtz & A. A. Edidin

  4. Unfallchirurgische Klinik, Medizinische Hochschule, Hannover

    U. Berlemann

  5. Exponent Inc., 3401 Market St. Suite 300, PA 19104, Philadelphia, USA, CA

    L. M. Villarraga Ph.D.

Authors
  1. L. M. Villarraga Ph.D.
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  2. P. A. Cripton
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  3. A. J. Bellezza
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  4. U. Berlemann
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  5. S. M. Kurtz
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  6. A. A. Edidin
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Correspondence to L. M. Villarraga Ph.D..

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Villarraga, L.M., Cripton, P.A., Bellezza, A.J. et al. Knochen und Knochen-Zement-Belastungen in der thorakolumbalen Wirbelsäule nach Kyphoplastik. Orthopäde 33, 48–55 (2004). https://doi.org/10.1007/s00132-003-0581-4

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  • DOI: https://doi.org/10.1007/s00132-003-0581-4

Schlüsselwörter

  • Kyphoplastik
  • Biomechanik
  • Knochenzement
  • Finite-Element-Analyse

Keywords

  • Kyphoplasty
  • Biomechanics
  • Bone cement
  • Finite element study