The mechanics of dental occlusion and disclusion

Thomas Katona, George J. Eckert

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background The mechanical environment associated with occluding teeth is the foundation for a wide range of research topics, clinical practice and dogma, product development and marketing, and medico-legal issues. The purpose of this study was to experimentally examine the relationships between occlusal factors and their impact on the associated contact forces. Methods Matching pairs of 0° 20° 33° and 40° cusp first molar denture teeth were placed into Class I, II and III molar relationships. As the teeth were brought together into occlusion and then separated, the loads experienced by the mandibular tooth were continuously measured by a load cell that was supporting it. Findings Loess smoothing splines were fitted to all data curves to calculate 95% confidence intervals. All lateral force magnitudes and directions were statistically different when compared between classes of occlusion, cusp angles, and occlusion vs. disclusion. Noteworthy counterintuitive observations were that the lateral contact force components were generally higher during disclusion than occlusion, the peak lateral force magnitudes did not always occur when the occlusal force was maximum, and the lateral contact force component magnitude can be larger than the occlusal force. Interpretation Wedging and friction account for these unexpected results. The data indicate that each occlusion/disclusion cycle is characterized by complex transient loads that may impact wear facet and non-carious cervical lesion formation, implant and restorative failures, various aspects of occlusal trauma, and the concept of axial occlusal loading.

Original languageEnglish (US)
Pages (from-to)84-91
Number of pages8
JournalClinical Biomechanics
Volume50
DOIs
StatePublished - Dec 1 2017

Fingerprint

Dental Occlusion
Mechanics
Tooth
Bite Force
Friction
Dentures
Weight-Bearing
Marketing
Confidence Intervals
Wounds and Injuries
Research

Keywords

  • Bite force
  • Clenching
  • Dental occlusion
  • Non-carious cervical lesion
  • Occlusal contact

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine

Cite this

The mechanics of dental occlusion and disclusion. / Katona, Thomas; Eckert, George J.

In: Clinical Biomechanics, Vol. 50, 01.12.2017, p. 84-91.

Research output: Contribution to journalArticle

Katona, Thomas ; Eckert, George J. / The mechanics of dental occlusion and disclusion. In: Clinical Biomechanics. 2017 ; Vol. 50. pp. 84-91.
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