Reliability of maximum static work efforts by the human masseter muscle

Area of Science:

• Biomedical Engineering
• Physiology
• Kinesiology

Background:

• The masseter muscle plays a crucial role in mastication and jaw stability.
• Assessing the reliability of maximal voluntary contractions is essential for understanding muscle function and fatigue.
• Non-fatiguing static work efforts are commonly used to evaluate muscle performance.

Purpose of the Study:

• To determine the reliability of nonfatiguing maximum voluntary static work efforts of the masseter muscle.
• To evaluate the consistency of masseter muscle performance over multiple trials and days.

Main Methods:

• Six healthy subjects participated in the study.
• Maximum voluntary teeth clenching in centric occlusion was performed for 10-second durations.
• Integrated surface electromyography (sEMG) quantified maximum static work efforts.
• Factorial analyses of variance and intraclass correlations were used to assess reliability.

Main Results:

• Maximum voluntary static work efforts of the masseter muscle demonstrated high reproducibility.
• Reliable performance was observed across four different trials conducted on two separate days.
• Data reduction confirmed consistent outcomes in static work efforts.

Conclusions:

• Nonfatiguing maximum voluntary static work efforts of the masseter muscle are a reliable measure.
• The findings support the use of this method for consistent assessment of masseter muscle function.
• This reliable measurement can be valuable in research and clinical applications related to masticatory function.