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Related Experiment Videos

Longitudinal electromyographic study of chewing patterns in complete-denture wearers.

A Tallgren1, B R Lang, S Holden

  • 1School of Dentistry, University of Michigan, Ann Arbor 48109.

The International Journal of Prosthodontics
|September 1, 1992
PubMed
Summary

Immediate complete dentures initially reduced anterior temporal muscle activity during chewing. Relining dentures improved chewing force, but activity declined again without further adjustments over two years.

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Area of Science:

  • Biomedical Engineering
  • Dental Prosthetics
  • Neuromuscular Studies

Background:

  • Chewing function is crucial for oral health and nutrition.
  • Electromyography (EMG) provides insights into muscle activity during mastication.
  • Immediate complete dentures aim to restore function post-extraction.

Purpose of the Study:

  • To longitudinally assess electromyographic activity of masticatory muscles in patients with immediate complete dentures.
  • To evaluate the impact of denture relining on chewing function over two years.

Main Methods:

  • Longitudinal electromyography (EMG) study.
  • 21 subjects with immediate complete dentures.
  • Measured anterior temporalis and masseter muscle activity during apple chewing over two years.

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Main Results:

  • Initial denture placement decreased anterior temporalis activity (48-58 microV).
  • Denture relining at 1 year increased temporal muscle force.
  • Masseter activity showed no significant changes; chewing cycle durations remained prolonged compared to dentate individuals.

Conclusions:

  • Immediate complete dentures significantly alter temporal muscle activity.
  • Denture maintenance (relining) can temporarily improve chewing force.
  • Long-term chewing function with complete dentures may not fully recover to natural dentition levels.