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Related Experiment Videos

Strength and bite, Part 2: Testing isometric strength using a MORA set to a functional criterion.

A G Forgione1, N R Mehta, C F McQuade

  • 1Tufts University School of Dental Medicine.

Cranio : the Journal of Craniomandibular Practice
|January 1, 1992
PubMed
Summary

This study found that biting on a custom-fitted intraoral device significantly enhances isometric strength, particularly the Isometric Deltoid Press (IDP). The findings suggest a strong link between bite force and overall physical strength.

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Area of Science:

  • Biomechanics
  • Sports Science
  • Neuromuscular Physiology

Background:

  • Isometric strength is crucial for athletic performance and daily activities.
  • The influence of intraoral devices on neuromuscular function and strength is not fully understood.
  • Previous research has speculated on the role of the bite and placebo effects on strength.

Purpose of the Study:

  • To investigate the effect of different intraoral devices and habitual occlusion on isometric strength.
  • To determine if a functional bite criterion can optimize isometric strength.
  • To assess the influence of placebo and bite-raising appliances on strength performance.

Main Methods:

  • Subjects with relative weakness in Isometric Deltoid Press (IDP) were selected.
  • Isometric strength was measured with subjects biting on three intraoral devices and habitual occlusion.

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  • Performance was compared across a functional appliance, a placebo appliance, and a bite-raising appliance.

    • Main Results:

    • Wearing an appliance set by a functional criterion significantly increased IDP performance compared to placebo and bite-raising appliances.
    • Strength was significantly greater when biting on the functional appliance versus all other conditions.
    • Habitual bite strength was superior to the placebo condition.

    Conclusions:

    • A significant relationship exists between bite and isometric strength.
    • Intraoral devices, particularly those optimized for functional bite, can enhance isometric strength.
    • The placebo effect did not significantly influence the observed strength improvements.