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[Initial masseter muscle fatigue in maximal voluntary teeth clenching]
Vojnosanitetski Pregled
|April 4, 2002
Summary
New dentures may delay the onset of fatigue in jaw muscles. Researchers found that masseter muscle fatigue occurred faster in individuals with natural teeth (31.5s) than those with new dentures (44.5s).
Area of Science:
- Biomedical Engineering
- Physiology
- Dental Science
Context:
- Muscle fatigue, defined as the inability to generate expected force during repeated contractions, is crucial in understanding masticatory system function.
- Maximal voluntary teeth clenching, particularly during isometric contraction in central occlusion, reveals initial fatigue in masticatory muscles.
- Peripheral fatigue in masticatory muscles is a key factor directly correlating with the overall function of the masticatory system.
Purpose:
- To investigate and compare the onset of initial fatigue in the masseter muscles.
- To evaluate differences in masseter muscle fatigue between individuals with naturally healthy intact dentition and those fitted with new full dentures.
Summary:
- Electromyography was used to synchronously record masseter muscle action potentials in 20 subjects with healthy stomatognathic systems (Angle skeletal class I).
- Subjects with naturally healthy intact dentition exhibited faster onset of masseter muscle fatigue (31.5 seconds) compared to subjects with new full dentures (44.5 seconds).
Impact:
- Findings suggest that new full dentures may influence the fatigue characteristics of the masseter muscles.
- This research provides insights into the functional differences between natural dentition and full dentures concerning muscle fatigue and masticatory system performance.
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