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Reducing condylar compression in clenching patients.

B M May1, C Garabadian

  • 1Department of Bioengineering, Clemson University, SC 29634, USA.

Critical Reviews in Biomedical Engineering
|December 7, 2000
PubMed
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This study shows that using an appliance to disengage posterior teeth reduces muscle activity during teeth clenching. This appliance lessens the forces on the temporomandibular joints and teeth.

Area of Science:

  • Biomedical Engineering
  • Dental Mechanics
  • Biomechanics

Background:

  • The masseter and temporalis muscles are key to teeth clenching.
  • Macro-clenching significantly increases EMG activity in these muscles.
  • Muscle contraction generates forces compressing teeth and temporomandibular joints (TMJ).

Purpose of the Study:

  • To measure EMG activity during maximal teeth clenching.
  • To evaluate the effect of an appliance on EMG activity and resultant forces.
  • To demonstrate reduced TMJ loading with posterior teeth disengagement.

Main Methods:

  • Measured EMG readings during bilateral macro-contraction of masseter and anterior temporalis muscles.
  • Fabricated an appliance to disengage posterior teeth.

Related Experiment Videos

  • Recorded EMG readings with the appliance in place to assess changes in muscle activity and force vectors.

    • Main Results:

    • EMG readings significantly increased during macro-clenching.
    • The appliance reduced EMG readings.
    • Reduced EMG recordings correlated with decreased condylar compression forces.

    Conclusions:

    • Disengaging posterior teeth with an appliance can lower muscle activity during clenching.
    • This reduction in muscle activity leads to decreased forces on the temporomandibular joints.
    • The findings suggest potential for managing clenching-related issues.