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Dynamic intra-articular space variation in clicking TMJs.
Journal article

Dynamic intra-articular space variation in clicking TMJs.

  • Gössi DB Clinic for Masticatory Disorders and Complete Dentures, Center for Oral Medicine, Dental and Maxillo-Facial Surgery, University of Zürich, Plattenstrasse 11, CH-8028 Zürich, Switzerland.
  • Gallo LM
  • Bahr E
  • Palla S
  • 2004-05-22
Published in:
  • Journal of dental research. - 2004
Adolescent
Adult
Cartilage, Articular
Female
Humans
Magnetic Resonance Imaging
Male
Mandible
Mandibular Condyle
Movement
Range of Motion, Articular
Sound
Statistics, Nonparametric
Stress, Mechanical
Temporal Bone
Temporomandibular Joint
Temporomandibular Joint Disc
Temporomandibular Joint Disorders
English During mandibular movement, the geometric relationships of the articular surfaces in the temporomandibular joint (TMJ) change, so that the disc undergoes different stress concentrations with respect to time and position. In this study, we compared the intra-articular space variations of 13 clicking and 15 asymptomatic TMJs for jaw opening/closing. Magnetic resonance imaging and jaw tracking were combined to display the motion of the whole condyle within the fossa. In clicking TMJs, the mediolateral spread s of the stress-field trajectories was 2.4 +/- 1.0 mm (s(max) = 4.9 +/- 2.1 mm) with an aspect ratio a/h of 2.5 +/- 1.6, both significantly greater than in controls (p < 0.05). The stress-field trajectories of the controls coincided during opening/closing (s = 0.9 +/- 0.2 mm, s(max) = 1.8 +/- 0.8 mm, a/h = 1.6 +/- 0.3). Clicking TMJs showed much less coincident stress-field paths and much "flatter" stress-fields than controls during jaw opening/closing.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://roar.hep-bejune.ch/global/documents/91266
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