ArticleScientific reports2022
The biomechanical significance of the elongated rodent incisor root in the mandible during incision.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 8 citations in OpenAlex.
- Biomechanics, muscle modeling, and the elevated bite force and tooth stress of piranhas.Die Naturwissenschaften · 2026Article
- Histological response of the periodontal tissue to mandibular incisor movement using clear aligners of varying thickness in a rabbit model.Korean journal of orthodontics · 2025Article
- The impact of biological variables on cell kinetics and differentiation dynamics in the mouse incisor epithelium.Scientific reports · 2025Article
- Variations in dietary patterns of living sloths revealed by finite element analysis of jaws.Journal of anatomy · 2024Article
- Cranial functional specialisation for strength precedes morphological evolution in Oviraptorosauria.Communications biology · 2024Article
- Mandibular characteristics of early Glires (Mammalia) reveal mixed rodent and lagomorph morphotypes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
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Authors and funding
3 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Rodents are characterised by a distinctive masticatory apparatus which includes a single pair of enlarged and continually growing incisors. This morphology, termed diprotodonty, has also independently evolved in a number of other mammals, including the aye-aye. This study examined the functional significance of the internal "root" of the elongated rodent-like incisor. The mandibles of four rodents and an aye-aye were modelled to exhibit incrementally shorter incisor roots. Finite element analysis was used to predict stress and strain patterns across the jaw to determine whether the length of the incisor root contributes to the resistance of mechanical forces encountered in the mandible during incision. It was found that von Mises stresses increase in the region of the mandible local to where the incisor is removed, but that the stress distribution across the wider mandible is only minimally affected. Thus, the long internal incisor appears to play a small role in resisting bending forces close to the incisor alveolus, and may act with the arch-like mandibular shape to strengthen the mandible in this region. However, the impact across the whole mandible is relatively limited, suggesting the highly elongate incisor in diprotodont mammals may be principally driven by other factors such as rapid incisor wear.
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