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Related Experiment Videos

Functional loading of the dentition during mastication.

D J Neill1, W L Kydd, R I Nairn

  • 1Department of Prosthetic Dentistry, United Medical and Dental School, London, England.

The Journal of Prosthetic Dentistry
|August 1, 1989
PubMed
Summary
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This study introduces a method using masseter muscle electrical activity to measure chewing force. Denture wearers may compensate for reduced chewing load by increasing application time, with inverted cusp teeth potentially increasing force on oral tissues.

Area of Science:

  • Biomedical Engineering
  • Dental Mechanics
  • Kinesiology

Background:

  • Accurate measurement of chewing force is crucial for understanding masticatory function.
  • Existing methods may not fully capture the dynamics of the chewing cycle.
  • Denture wearers often experience altered chewing efficiency compared to individuals with natural dentition.

Purpose of the Study:

  • To describe a novel method for assessing chewing force using the electrical activity of the masseter muscles.
  • To analyze the interrelationship and duration of different phases within the chewing cycle.
  • To compare chewing dynamics between dentate subjects and complete denture wearers.

Main Methods:

  • Utilized a kinesiograph to record electrical activity in the masseter muscles.

Related Experiment Videos

  • Quantified chewing force by correlating muscle electrical signals with applied load.
  • Analyzed the temporal phases of the chewing cycle, including duration and sequence.

    • Main Results:

    • A significant reduction in the magnitude of applied chewing load was observed in complete denture wearers.
    • Denture wearers compensated for reduced load magnitude by increasing the duration of force application.
    • The use of inverted cusp teeth in denture construction was associated with increased force on the supporting mucoperiosteum.

    Conclusions:

    • Masseter muscle electrical activity provides a viable index for quantifying chewing force and cycle dynamics.
    • Denture wearers exhibit compensatory mechanisms in chewing force application.
    • Denture tooth design, specifically inverted cusps, can influence the load distribution on oral tissues.