Static and dynamic loading effects on temporomandibular joint disc tractional forces

J. C. Nickel, L. R. Iwasaki, M. W. Beatty, M. A. Moss, D. B. Marx

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Mechanical fatigue-related degeneration of the temporomandibular joint (TMJ) disc may be promoted by tractional forces. This study tested the hypotheses that tractional forces following static loading of the TMJ disc: (1) increase with compressive strain at the start of movement, and (2) are velocity-dependent during movement. Sixty-four porcine discs received a 10-N static load via an acrylic indenter for 1 or 30 sec before cyclic movement. Physical data were recorded and analyzed by ANOVA. The results showed that compressive strain and tractional forces were largest for the start of movement following 30 sec of static loading (p ≤ 0.0001) and were correlated (R 2 = 0.84). Peak tractional forces were linearly and positively related to velocity of movement (R2 = 0.85), and were highest during Cycle 1 after 30 sec of loading (p ≤ 0.0067). The results demonstrated that tractional forces were strain-related at the start of movement and velocity-dependent during movement.

Original languageEnglish (US)
Pages (from-to)809-813
Number of pages5
JournalJournal of Dental Research
Issue number9
StatePublished - Sep 2006


  • Cartilage
  • Mechanics
  • Plowing
  • Strain
  • TMJ

ASJC Scopus subject areas

  • General Dentistry


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