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Masticatory performance and chewing cycle kinematics-are they related?
Casey Lepley1, Gaylord Throckmorton, Sarah Parker
1Department of Cell Biology, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA.
The Angle Orthodontist
|November 13, 2009
Summary
Individuals with poorer chewing performance exhibit less consistent jaw movements and altered chewing cycle shapes compared to better performers. This study analyzed jaw movement patterns to understand masticatory efficiency differences.
Area of Science:
- Biomechanics
- Dental Science
Background:
- Masticatory performance is crucial for nutrient intake and overall health.
- Understanding jaw movement kinematics can reveal functional differences in chewing efficiency.
Purpose of the Study:
- To compare chewing cycle kinematics between individuals with better and poorer masticatory performance.
- To identify kinematic differences associated with varying levels of chewing efficiency.
Main Methods:
- A cross-sectional study involving 30 subjects with Class I occlusion.
- Masticatory performance assessed using the artificial test food Cuttersil.
- Three-dimensional jaw movements tracked with an optoelectric system during chewing.
- Multilevel linear modeling analyzed cycle shape, duration, and excursions.
Main Results:
- Poorer performers demonstrated significantly longer opening durations.
- Differences in cycle shape were observed, including less horizontal closure paths and more posterior jaw movement in poorer performers.
- Poorer performers showed significantly greater within-subject variability in chewing cycle duration and excursive movements.
Conclusions:
- Poorer masticatory performance is characterized by inconsistent chewing cycles.
- Distinct differences in chewing cycle shape exist between individuals with better and poorer chewing abilities.
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