Masseter muscle bite force in first bicuspid and collapsed occlusion cases

Area of Science:

• Biomechanical Engineering
• Dental Science
• Human Physiology

Background:

• The masseter muscle is crucial for mastication and swallowing.
• Understanding masseter muscle strength is vital for diagnosing and treating various dental and occlusal conditions.
• Previous research has explored factors influencing bite force, but comparative analyses across specific occlusal states remain important.

Purpose of the Study:

• To compare masseter muscle strength in individuals with different occlusal conditions.
• To investigate the impact of bicuspid extraction and collapsed occlusions on bite force generation.
• To establish baseline masseter muscle strength in a control group for future research.

Main Methods:

• Electromyography (EMG) was utilized to record masseter muscle activity.
• Eighty-nine subjects were categorized into three groups: 4-bicuspid extraction cases, collapsed occlusions, and healthy controls.
• Muscle strength data was averaged and statistically analyzed across the groups.

Main Results:

• The control group exhibited significantly greater masseter muscle strength compared to the other two groups.
• Individuals with collapsed occlusions showed lower bite force generation than controls.
• The bicuspid extraction group also displayed reduced masseter muscle strength, though specific comparisons require further analysis.

Conclusions:

• Occlusal status significantly influences masseter muscle strength.
• Bicuspid extraction and collapsed occlusions may lead to diminished bite force.
• These findings highlight the importance of maintaining proper occlusion for optimal masticatory function.