• Institution: LOCKSS

A Comparison of the Mechanical Properties of the Goat Temporomandibular Joint Disc to the Mandibular Condylar Cartilage in Unconfined Compression

  1. Catherine K. Hagandora
  2. Thomas W. Chase
  3. Alejandro J. Almarza
  1. Department of Oral Biology, Department of Bioengineering, Center for Craniofacial Regeneration, McGowan Institute of Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, 15261, USA
  1. Alejandro J. Almarza, aja19{at}pitt.edu


The aim of this study was to make a comparison of the compressive properties of the goat temporomandibular joint (TMJ) disc to the mandibular condylar cartilage (MCC) and to explore the transversely isotropic biphasic model. Samples taken mediolaterally from three regions of the TMJ disc and MCC were tested in unconfined compression at strain levels ranging from 10% to 50% and then assessed for biochemical content. The results indicated that the TMJ disc exhibits a significantly greater tangent modulus than the MCC from 20% to 50% strain with values ranging from Formula to Formula kPa and Formula to Formula kPa, respectively (Formula ). The collagen content of the TMJ disc was significantly greater than the MCC, while the opposite held for the glycosaminoglycan (GAG) and DNA content. The results emphasize fundamental differences between the articulating tissues of the TMJ.

  • Received January 7, 2011.
  • Revision received March 14, 2011.
  • Accepted March 24, 2011.

This Article

  1. J Dent Biomech vol. 2 no. 1 2011_212385
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