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Updated: May 19, 2026
07:26
Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
Functional constraints on tooth morphology in carnivorous mammals.
Peter D Smits1, Alistair R Evans
1Department of Biological Sciences, Monash University, Melbourne, VIC 3800, AUS. peter.smits@monash.edu
BMC Evolutionary Biology
|August 18, 2012
Summary
Mandibular motion, not just opposing tooth row shape, significantly influences tooth row evolution in carnivorous mammals. This study quantifies kinetic features for a deeper understanding of adaptation.
Area of Science:
- Evolutionary biology
- Comparative anatomy
- Biomechanics
Background:
- Evolutionary morphology is shaped by complex interactions between development and function.
- Understanding adaptation and convergent evolution requires quantifying these interactions.
- Previous studies often relied on static morphological measures.
Purpose of the Study:
- To investigate the influence of mandibular motion (kinetic features) on tooth row shape.
- To compare statistical models incorporating static and kinetic features.
- To test hypotheses of functional integration in mammalian dentition.
Main Methods:
- Utilized 3D reconstructions of carnivoran and dasyuromorph tooth rows.
- Compared statistical models of tooth row shape against opposing tooth row and mandibular motion.
- Measured mandibular lateral translation during occlusion as a kinetic feature.
Main Results:
- Models incorporating mandibular motion provided a better understanding of tooth form.
- Best-performing models included both opposing tooth row shape and mandibular motion measures.
- Purely static models of tooth shape were found to be too simplistic.
Conclusions:
- Provided quantitative support for hypotheses linking tooth row shape to mandibular motion.
- Highlighted the necessity of including kinetic features in morphological integration analyses.
- Demonstrated the utility of movement and displacement measures in evolutionary studies.
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