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Home / Equine Research Bank / J Orthop Res / Viscoelastic shear properties of the equine medial meniscus.
Journal of orthopaedic research : official publication of the Orthopaedic Research Society1991; 9(4); 550-558; doi: 10.1002/jor.1100090411

Viscoelastic shear properties of the equine medial meniscus.

Abstract: Recent studies have shown that the meniscus is highly anisotropic in tension and that its compressive creep behavior can be modeled using biphasic theory. In this study, an alternative approach is used, where viscoelastic shear properties of the meniscal fibrocartilage are measured to determine the anisotropy and inhomogeneity of this tissue with respect to specimen location and fiber orientation. Medial menisci were obtained from eight skeletally-mature horses. Nine test specimens were taken from the circumferential midsubstance of each meniscus, at three circumferential and three axial positions. The magnitude of the complex shear modulus and the phase angle were determined for each specimen from 100-800 Hz, in 100 Hz increments. Data were gathered shearing parallel and perpendicular to the circumferentially-oriented fibers. The magnitude of the shear modulus and the phase angle were both found to be frequency dependent, anisotropic, and inhomogeneous. The magnitude of the shear modulus increased with frequency, and was greatest in specimens from the posterior superior region, shearing parallel to the fibers. The phase angle decreased slightly with frequency and was lowest in specimens from the midsubstance of the anterior region, shearing perpendicular to the fibers. Our data demonstrated that collagen fibers substantially stiffen the meniscus in the direction of its fibers and that the solid matrix of the meniscus, like articular cartilage, behaves largely as an elastic material.
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Publication Date: 1991-07-01 PubMed ID: 2045982DOI: 10.1002/jor.1100090411Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • U.S. Gov't
  • Non-P.H.S.
  • Research Support
  • U.S. Gov't
  • P.H.S.

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research focuses on studying the viscoelastic shear properties of the meniscus in horses, demonstrating that these properties can vary based on location, fiber orientation and frequency. This can help in understanding how the menisci function and respond to stress.

Study Design

  • The study was conducted on the medial menisci from eight adult horses, with nine test specimens taken from the midsubstance of each meniscus across three circumferential and three axial positions.
  • The researchers then measured the complex shear modulus (a measure of a substance’s response to shear stress) and phase angle (a measure of delay between a sinusoidal stress and the resultant strain) of each specimen at different frequencies between 100 and 800 Hz, in 100 Hz increments.
  • The measurements were taken both parallel and perpendicular to the orientation of the meniscal fibers, allowing the researchers to assess the tissue’s anisotropy (varying material properties based on direction) and inhomogeneity (uneven material properties).

Results

  • The results showed that both the shear modulus and phase angle were frequency dependent, anisotropic, and inhomogeneous.
  • The magnitude of the shear modulus increased with frequency and was greatest in the specimens from the posterior superior region, when sheared parallel to the fibers.
  • The phase angle decreased slightly with frequency and was at its lowest in specimens from the midsubstance of the anterior region when sheared perpendicular to the fibers.

Conclusion

  • The data revealed that the collagen fibers significantly stiffen the meniscus in the direction of its fibers.
  • It also indicated that the solid matrix of the meniscus behaves in a similar manner to elastic material, much like articular cartilage.
  • This research contributes to the understanding of how the meniscus works and how it responds to varying degrees of stress, potentially aiding in the design of therapies and interventions for meniscus related injuries or conditions.

Cite This Article

APA
Anderson DR, Woo SL, Kwan MK, Gershuni DH. (1991). Viscoelastic shear properties of the equine medial meniscus. J Orthop Res, 9(4), 550-558. https://doi.org/10.1002/jor.1100090411

Publication

Journal of orthopaedic research : official publication of the Orthopaedic Research Society
ISSN: 0736-0266
NlmUniqueID: 8404726
Country: United States
Language: English
Volume: 9
Issue: 4
Pages: 550-558

Researcher Affiliations

Anderson, D R
  • Division of Orthopaedics and Rehabilitation, University of California, San Diego.
Woo, S L
    Kwan, M K
      Gershuni, D H

        MeSH Terms

        • Animals
        • Biomechanical Phenomena
        • Elasticity
        • Horses / physiology
        • Menisci, Tibial / chemistry
        • Menisci, Tibial / physiology
        • Proteoglycans / analysis

        Grant Funding

        • AM07484 / NIADDK NIH HHS

        Citations

        This article has been cited 14 times.
        1. Rasheed B, Ayyalasomayajula V, Schaarschmidt U, Vagstad T, Schaathun HG. Region- and layer-specific investigations of the human menisci using SHG imaging and biaxial testing.. Front Bioeng Biotechnol 2023;11:1167427.
          doi: 10.3389/fbioe.2023.1167427pubmed: 37143602google scholar: lookup
        2. Schwartz G, Morejon A, Gracia J, Best TM, Jackson AR, Travascio F. Heterogeneity of dynamic shear properties of the meniscus: A comparison between tissue core and surface layers.. J Orthop Res 2023 Jul;41(7):1607-1617.
          doi: 10.1002/jor.25495pubmed: 36448086google scholar: lookup
        3. De Rosa M, Filippone G, Best TM, Jackson AR, Travascio F. Mechanical properties of meniscal circumferential fibers using an inverse finite element analysis approach.. J Mech Behav Biomed Mater 2022 Feb;126:105073.
          doi: 10.1016/j.jmbbm.2022.105073pubmed: 34999488google scholar: lookup
        4. Eremina G, Smolin A. Numerical Modeling of Shockwave Treatment of Knee Joint.. Materials (Basel) 2021 Dec 13;14(24).
          doi: 10.3390/ma14247678pubmed: 34947273google scholar: lookup
        5. Norberg C, Filippone G, Andreopoulos F, Best TM, Baraga M, Jackson AR, Travascio F. Viscoelastic and equilibrium shear properties of human meniscus: Relationships with tissue structure and composition.. J Biomech 2021 May 7;120:110343.
          doi: 10.1016/j.jbiomech.2021.110343pubmed: 33730559google scholar: lookup
        6. Peloquin JM, Santare MH, Elliott DM. Short cracks in knee meniscus tissue cause strain concentrations, but do not reduce ultimate stress, in single-cycle uniaxial tension.. R Soc Open Sci 2018 Nov;5(11):181166.
          doi: 10.1098/rsos.181166pubmed: 30564409google scholar: lookup
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          doi: 10.1016/j.jmbbm.2018.05.011pubmed: 29793157google scholar: lookup
        8. Babaei B, Velasquez-Mao AJ, Thomopoulos S, Elson EL, Abramowitch SD, Genin GM. Discrete quasi-linear viscoelastic damping analysis of connective tissues, and the biomechanics of stretching.. J Mech Behav Biomed Mater 2017 May;69:193-202.
          doi: 10.1016/j.jmbbm.2016.12.013pubmed: 28088071google scholar: lookup
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          doi: 10.1098/rsif.2015.0707pubmed: 26609064google scholar: lookup
        10. Wheatley BB, Fischenich KM, Button KD, Haut RC, Haut Donahue TL. An optimized transversely isotropic, hyper-poro-viscoelastic finite element model of the meniscus to evaluate mechanical degradation following traumatic loading.. J Biomech 2015 Jun 1;48(8):1454-60.
          doi: 10.1016/j.jbiomech.2015.02.028pubmed: 25776872google scholar: lookup
        11. Baro VJ, Bonnevie ED, Lai X, Price C, Burris DL, Wang L. Functional characterization of normal and degraded bovine meniscus: rate-dependent indentation and friction studies.. Bone 2012 Aug;51(2):232-40.
          doi: 10.1016/j.bone.2012.03.009pubmed: 22449445google scholar: lookup
        12. Abraham AC, Edwards CR, Odegard GM, Donahue TL. Regional and fiber orientation dependent shear properties and anisotropy of bovine meniscus.. J Mech Behav Biomed Mater 2011 Nov;4(8):2024-30.
          doi: 10.1016/j.jmbbm.2011.06.022pubmed: 22098902google scholar: lookup
        13. Driscoll TP, Nerurkar NL, Jacobs NT, Elliott DM, Mauck RL. Fiber angle and aspect ratio influence the shear mechanics of oriented electrospun nanofibrous scaffolds.. J Mech Behav Biomed Mater 2011 Nov;4(8):1627-36.
          doi: 10.1016/j.jmbbm.2011.03.022pubmed: 22098865google scholar: lookup
        14. Messner K, Gao J. The menisci of the knee joint. Anatomical and functional characteristics, and a rationale for clinical treatment.. J Anat 1998 Aug;193 ( Pt 2)(Pt 2):161-78.
          doi: 10.1046/j.1469-7580.1998.19320161.xpubmed: 9827632google scholar: lookup
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