A feedback method to determine the three-dimensional bite-force capabilities of the human masticatory system

Area of Science:

• Biomechanics
• Human Jaw Muscle Physiology

Background:

• Understanding human jaw muscle function is crucial for diagnosing and treating various oral and maxillofacial conditions.
• Quantifying bite force direction and magnitude is complex due to the multi-directional nature of jaw muscle contractions.

Purpose of the Study:

• To develop and validate a computer-based feedback system for precise bite force control.
• To investigate the range of bite force directions and magnitudes achievable at different dental arch locations.
• To analyze jaw muscle recruitment patterns during controlled static contractions.

Main Methods:

• A 3D force transducer captured bite force data.
• A computer system processed and visualized force magnitude and direction.
• Subjects used visual feedback to match a target cursor, controlling their bite force.
• The system was used to measure bite forces at various points on the dental arch.

Main Results:

• The feedback system successfully enabled subjects to exert controlled bite forces in specified directions.
• The procedure allowed for the determination of bite force ranges and directions across the dental arch.
• Concomitant jaw muscle recruitment patterns were studied in relation to controlled bite forces.

Conclusions:

• The developed feedback procedure is effective for studying human jaw muscle biomechanics.
• This method provides a valuable tool for quantifying bite force capabilities and muscle activation.
• Further research can utilize this system to explore various aspects of oral motor function and dysfunction.