Tensile characterization of porcine temporomandibular joint disc attachments

M. K. Murphy, Boaz Arzi, J. C. Hu, K. A. Athanasiou

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The frequency and impact of temporomandibular joint (TMJ) disorders necessitate research in characterizing the joint's function. The 6 discal attachments have not yet been systematically characterized under tension. Understanding their role in joint function may guide our study of TMJ pathologies, including disc displacement. In the present study, a porcine model was used to characterize the attachments in tension anteroposteriorly and mediolaterally, based on previously identified similarities in the porcine and human masticatory behaviors and discal properties. Tensile stiffness, strength, toughness, and maximum strain were quantified. Collagen alignment was characterized via polarized light and scanning electron microscopy. Anisotropy was demonstrated in all attachments, with the exception of the anterior inferior attachment. Anteroposteriorly, the lateral attachment was stiffest (8.3 MPa) and the anterior superior was least stiff (1.4 MPa). Mediolaterally, the posterior superior attachment was stiffest (16.3 MPa) and the medial was least stiff (1.4 MPa). The greatest strain was observed in the lateral attachment in the mediolateral direction and the posterior superior attachment in the anteroposterior direction. With greatest strains in the most commonly observed directions of disc displacement, it is suggested that compromise in the posterior and lateral attachments contributes to partial lateral and anterior disc displacement.

Original languageEnglish (US)
Pages (from-to)753-758
Number of pages6
JournalJournal of Dental Research
Volume92
Issue number8
DOIs
StatePublished - Aug 2013

Fingerprint

Temporomandibular Joint Disc
Swine
Joints
Temporomandibular Joint Disorders
Tensile Strength
Temporomandibular Joint
Anisotropy
Electron Scanning Microscopy
Collagen
Pathology
Light
Research
Direction compound

Keywords

  • cartilage
  • extracellular matrix (ECM)
  • microscopy
  • regenerative medicine
  • stress analysis
  • temporomandibular disorders (TMD)

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Tensile characterization of porcine temporomandibular joint disc attachments. / Murphy, M. K.; Arzi, Boaz; Hu, J. C.; Athanasiou, K. A.

In: Journal of Dental Research, Vol. 92, No. 8, 08.2013, p. 753-758.

Research output: Contribution to journalArticle

Murphy, M. K. ; Arzi, Boaz ; Hu, J. C. ; Athanasiou, K. A. / Tensile characterization of porcine temporomandibular joint disc attachments. In: Journal of Dental Research. 2013 ; Vol. 92, No. 8. pp. 753-758.
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