Viscoelastic characterization of the porcine temporomandibular joint disc under unconfined compression

Kyle D. Allen, Kyriacos A. Athanasiou

Research output: Contribution to journalArticle

102 Citations (Scopus)

Abstract

Pathophysiology of the temporomandibular joint (TMJ) disc is central to many orofacial disorders; however, mechanical characterization of this tissue is incomplete. In this study, we identified surface-regional mechanical variations in the porcine TMJ disc under unconfined compression. The intermediate zone, posterior, anterior, lateral, and medial regions of eight TMJ discs were sectioned into inferior and superior surface samples. Surface-regional sections were then subjected to incremental stress relaxation tests. Single strain step (SSS) and final deformation (FD) viscoelastic models were fit to experimental data. Both models represented the experimental data with a high degree of accuracy (R̄2=0.93). The instantaneous modulus and relaxation modulus for the TMJ disc sections were approximately 500 kPa and 80 kPa, respectively; the coefficient of viscosity was approximately 3.5 MPa-s. Strain dependent material properties were observed across the disc's surface-regions. Regional variations in stiffness were observed in both models. The relaxation modulus was largest in the inferior-medial parts of the disc. The instantaneous modulus was largest in the posterior and anterior regions of the disc. Surface-to-surface variations were observed in the relaxation modulus for only the FD model; the inferior surface was found to be more resistant to compression than the superior surface. The results of this study imply the stiffness of the TMJ disc may change as strain is applied. Furthermore, the lateral region exhibited a lower viscosity and stiffness compared to other disc regions. Both findings may have important implications on the TMJ disc's role in jaw motion and function.

Original languageEnglish (US)
Pages (from-to)312-322
Number of pages11
JournalJournal of Biomechanics
Volume39
Issue number2
DOIs
StatePublished - 2006
Externally publishedYes

Fingerprint

Temporomandibular Joint Disc
Swine
Viscosity
Stiffness
Jaw
Exercise Test
Temporomandibular Joint
Stress relaxation
Theoretical Models
Materials properties
Tissue

Keywords

  • Coefficient of viscosity
  • Incremental stress relaxation
  • Instantaneous and relaxation modulus
  • Temporomandibular joint disc
  • Viscoelastic modeling

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Viscoelastic characterization of the porcine temporomandibular joint disc under unconfined compression. / Allen, Kyle D.; Athanasiou, Kyriacos A.

In: Journal of Biomechanics, Vol. 39, No. 2, 2006, p. 312-322.

Research output: Contribution to journalArticle

Allen, Kyle D. ; Athanasiou, Kyriacos A. / Viscoelastic characterization of the porcine temporomandibular joint disc under unconfined compression. In: Journal of Biomechanics. 2006 ; Vol. 39, No. 2. pp. 312-322.
@article{53cbc45ef90340a3a780dd1dc9843840,
title = "Viscoelastic characterization of the porcine temporomandibular joint disc under unconfined compression",
abstract = "Pathophysiology of the temporomandibular joint (TMJ) disc is central to many orofacial disorders; however, mechanical characterization of this tissue is incomplete. In this study, we identified surface-regional mechanical variations in the porcine TMJ disc under unconfined compression. The intermediate zone, posterior, anterior, lateral, and medial regions of eight TMJ discs were sectioned into inferior and superior surface samples. Surface-regional sections were then subjected to incremental stress relaxation tests. Single strain step (SSS) and final deformation (FD) viscoelastic models were fit to experimental data. Both models represented the experimental data with a high degree of accuracy (R̄2=0.93). The instantaneous modulus and relaxation modulus for the TMJ disc sections were approximately 500 kPa and 80 kPa, respectively; the coefficient of viscosity was approximately 3.5 MPa-s. Strain dependent material properties were observed across the disc's surface-regions. Regional variations in stiffness were observed in both models. The relaxation modulus was largest in the inferior-medial parts of the disc. The instantaneous modulus was largest in the posterior and anterior regions of the disc. Surface-to-surface variations were observed in the relaxation modulus for only the FD model; the inferior surface was found to be more resistant to compression than the superior surface. The results of this study imply the stiffness of the TMJ disc may change as strain is applied. Furthermore, the lateral region exhibited a lower viscosity and stiffness compared to other disc regions. Both findings may have important implications on the TMJ disc's role in jaw motion and function.",
keywords = "Coefficient of viscosity, Incremental stress relaxation, Instantaneous and relaxation modulus, Temporomandibular joint disc, Viscoelastic modeling",
author = "Allen, {Kyle D.} and Athanasiou, {Kyriacos A.}",
year = "2006",
doi = "10.1016/j.jbiomech.2004.11.012",
language = "English (US)",
volume = "39",
pages = "312--322",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "2",

}

TY - JOUR

T1 - Viscoelastic characterization of the porcine temporomandibular joint disc under unconfined compression

AU - Allen, Kyle D.

AU - Athanasiou, Kyriacos A.

PY - 2006

Y1 - 2006

N2 - Pathophysiology of the temporomandibular joint (TMJ) disc is central to many orofacial disorders; however, mechanical characterization of this tissue is incomplete. In this study, we identified surface-regional mechanical variations in the porcine TMJ disc under unconfined compression. The intermediate zone, posterior, anterior, lateral, and medial regions of eight TMJ discs were sectioned into inferior and superior surface samples. Surface-regional sections were then subjected to incremental stress relaxation tests. Single strain step (SSS) and final deformation (FD) viscoelastic models were fit to experimental data. Both models represented the experimental data with a high degree of accuracy (R̄2=0.93). The instantaneous modulus and relaxation modulus for the TMJ disc sections were approximately 500 kPa and 80 kPa, respectively; the coefficient of viscosity was approximately 3.5 MPa-s. Strain dependent material properties were observed across the disc's surface-regions. Regional variations in stiffness were observed in both models. The relaxation modulus was largest in the inferior-medial parts of the disc. The instantaneous modulus was largest in the posterior and anterior regions of the disc. Surface-to-surface variations were observed in the relaxation modulus for only the FD model; the inferior surface was found to be more resistant to compression than the superior surface. The results of this study imply the stiffness of the TMJ disc may change as strain is applied. Furthermore, the lateral region exhibited a lower viscosity and stiffness compared to other disc regions. Both findings may have important implications on the TMJ disc's role in jaw motion and function.

AB - Pathophysiology of the temporomandibular joint (TMJ) disc is central to many orofacial disorders; however, mechanical characterization of this tissue is incomplete. In this study, we identified surface-regional mechanical variations in the porcine TMJ disc under unconfined compression. The intermediate zone, posterior, anterior, lateral, and medial regions of eight TMJ discs were sectioned into inferior and superior surface samples. Surface-regional sections were then subjected to incremental stress relaxation tests. Single strain step (SSS) and final deformation (FD) viscoelastic models were fit to experimental data. Both models represented the experimental data with a high degree of accuracy (R̄2=0.93). The instantaneous modulus and relaxation modulus for the TMJ disc sections were approximately 500 kPa and 80 kPa, respectively; the coefficient of viscosity was approximately 3.5 MPa-s. Strain dependent material properties were observed across the disc's surface-regions. Regional variations in stiffness were observed in both models. The relaxation modulus was largest in the inferior-medial parts of the disc. The instantaneous modulus was largest in the posterior and anterior regions of the disc. Surface-to-surface variations were observed in the relaxation modulus for only the FD model; the inferior surface was found to be more resistant to compression than the superior surface. The results of this study imply the stiffness of the TMJ disc may change as strain is applied. Furthermore, the lateral region exhibited a lower viscosity and stiffness compared to other disc regions. Both findings may have important implications on the TMJ disc's role in jaw motion and function.

KW - Coefficient of viscosity

KW - Incremental stress relaxation

KW - Instantaneous and relaxation modulus

KW - Temporomandibular joint disc

KW - Viscoelastic modeling

UR - http://www.scopus.com/inward/record.url?scp=28444457721&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28444457721&partnerID=8YFLogxK

U2 - 10.1016/j.jbiomech.2004.11.012

DO - 10.1016/j.jbiomech.2004.11.012

M3 - Article

C2 - 16321633

AN - SCOPUS:28444457721

VL - 39

SP - 312

EP - 322

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 2

ER -