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[Influences of balancing-side interference on jaw function].

K Baba1

  • 1First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University.

Kokubyo Gakkai Zasshi. the Journal of the Stomatological Society, Japan
|March 1, 1991
PubMed
Summary
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Artificial balancing-side interference in the jaw altered temporal muscle activity during clenching and chewing. This suggests specific temporal muscle responses to occlusal interferences during parafunctional activities.

Area of Science:

  • Dental occlusion
  • Biomechanics of mastication
  • Electromyography

Context:

  • Dental interferences can affect jaw function.
  • Understanding muscle responses to occlusal changes is crucial for dental treatment.
  • Previous research has not fully elucidated the effects of balancing-side interference on jaw muscle activity.

Purpose:

  • To investigate the electromyographic (EMG) activity of masticatory muscles in response to experimental balancing-side interference.
  • To analyze mandibular movement during various tasks with and without the interference.

Summary:

  • Six subjects were fitted with a custom onlay on the lower second molar to create artificial balancing-side interference.
  • Electromyographic activity of masseter and temporal muscles, and mandibular movements were recorded during maximum clenching, lateral gliding, and gum chewing.

Related Experiment Videos

  • Balancing-side interference altered muscle activity ratios, particularly in temporal muscles during clenching and gliding, and increased muscle activity during chewing on the contralateral side.
  • Impact:

    • Findings suggest that balancing-side interference may trigger specific temporal muscle activity during parafunctional clenching or grinding.
    • This research contributes to understanding the neuromuscular adaptations to occlusal disturbances.
    • Results may inform the diagnosis and management of temporomandibular disorders related to occlusal factors.