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Characterizing masticatory motion of dogs using optical and electromagnetic motion tracking
Stephanie Goldschmidt1, Hooi Pin Chew2,3, Stephen Guy4
1Department of Veterinary Clinical Sciences, University of Minnesota, St. Paul, MN, United States.
Frontiers in Veterinary Science
|July 18, 2025
Summary
Dog chewing motion primarily involves a hinge movement, with chewing frequency influenced by food hardness. This research aids in understanding food-teeth interactions for product development and oral health in dogs.
Area of Science:
- Veterinary biomechanics
- Animal physiology
Background:
- Accurate characterization of masticatory motion is crucial for ex-vivo food-teeth interaction studies.
- Previous research has not fully detailed masticatory motion in domestic dogs (Canis lupus).
Purpose of the Study:
- To characterize masticatory motion in beagle dogs across various food types.
- To utilize optical and electromagnetic motion tracking for detailed analysis.
Main Methods:
- Beagle dogs were used to analyze chewing patterns.
- Optical and electromagnetic motion tracking technologies were employed.
- Masticatory motion, mouth opening, and chewing frequency were recorded for different food types.
Main Results:
- Masticatory motion in beagles is predominantly a hinge motion with minimal horizontal mandibular movement.
- Mouth opening dimensions remained consistent across various food types, irrespective of stiffness or fracture force.
- Chewing frequency was significantly higher for kibbles (2.93 Hz) and correlated linearly with the force required to fracture food (p=0.03, R²=0.56).
Conclusions:
- The findings provide essential data for ex-vivo modeling of food-teeth interactions in dogs.
- This research can inform product design and testing, particularly for preventing periodontal disease and dentoalveolar trauma.
