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The way wear goes : phytolith-based wear on the dentine–enamel system in guinea pigs (Cavia porcellus)

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Abstract
The effect of phytoliths on tooth wear and function has been contested in studies of animal-plant interactions. For herbivores whose occlusal chewing surface consists of enamel ridges and dentine tissue, the phytoliths might particularly erode the softer dentine, exposing the enamel ridges to different occlusal forces and thus contributing to enamel wear. To test this hypothesis, we fed guinea pigs (Cavia porcellus; n = 36 in six groups) for three weeks exclusively on dry or fresh forage of low (lucerne), moderate (fresh timothy grass) or very high (bamboo leaves) silica content representing corresponding levels of phytoliths. We quantified the effect of these treatments with measurements from micro-computed tomography scans. Tooth height indicated extreme wear due to the bamboo diet that apparently brought maxillary incisors and molars close to the minimum required for functionality. There were negative relationships between a cheek tooth's height and the depth of its dentine basin, corroborating the hypothesis that dentine erosion plays an important role in herbivore tooth wear. In spite of lower body mass, bamboo-fed animals paradoxically had longer cheek tooth rows and larger occlusal surfaces. Because ever-growing teeth can only change in shape from the base upwards, this is a strong indication that failure to compensate for wear by dental height-growth additionally triggered general expansive growth of the tooth bases. The results suggest that enamel wear may intensify after enamel has been exposed due to a faster wear of the surrounding dentine tissue (and not the other way around), and illustrate a surprising plasticity in the reactivity of this rodent's system that adjusts tooth growth to wear.
Keywords
General Biochemistry, Genetics and Molecular Biology, General Immunology and Microbiology, General Agricultural and Biological Sciences, General Environmental Science, General Medicine, dental wear, herbivory, growth, phytoliths, guinea pigs, plasticity, TOOTH SIZE, FED DIETS, TEETH, MAMMALS, INCISOR, GROWTH, DENTITIONS, EVOLUTION, PORCELLUS, RABBITS

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MLA
Martin, Louise F., et al. “The Way Wear Goes : Phytolith-Based Wear on the Dentine–Enamel System in Guinea Pigs (Cavia Porcellus).” PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, vol. 286, no. 1912, 2019.
APA
Martin, L. F., Winkler, D., Tütken, T., Codron, D., De Cuyper, A., Hatt, J.-M., & Clauss, M. (2019). The way wear goes : phytolith-based wear on the dentine–enamel system in guinea pigs (Cavia porcellus). PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 286(1912).
Chicago author-date
Martin, Louise F., Daniela Winkler, Thomas Tütken, Daryl Codron, Annelies De Cuyper, Jean-Michel Hatt, and Marcus Clauss. 2019. “The Way Wear Goes : Phytolith-Based Wear on the Dentine–Enamel System in Guinea Pigs (Cavia Porcellus).” PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 286 (1912).
Chicago author-date (all authors)
Martin, Louise F., Daniela Winkler, Thomas Tütken, Daryl Codron, Annelies De Cuyper, Jean-Michel Hatt, and Marcus Clauss. 2019. “The Way Wear Goes : Phytolith-Based Wear on the Dentine–Enamel System in Guinea Pigs (Cavia Porcellus).” PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 286 (1912).
Vancouver
1.
Martin LF, Winkler D, Tütken T, Codron D, De Cuyper A, Hatt J-M, et al. The way wear goes : phytolith-based wear on the dentine–enamel system in guinea pigs (Cavia porcellus). PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES. 2019;286(1912).
IEEE
[1]
L. F. Martin et al., “The way wear goes : phytolith-based wear on the dentine–enamel system in guinea pigs (Cavia porcellus),” PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, vol. 286, no. 1912, 2019.
@article{8656682,
  abstract     = {The effect of phytoliths on tooth wear and function has been contested in studies of animal-plant interactions. For herbivores whose occlusal chewing surface consists of enamel ridges and dentine tissue, the phytoliths might particularly erode the softer dentine, exposing the enamel ridges to different occlusal forces and thus contributing to enamel wear. To test this hypothesis, we fed guinea pigs (Cavia porcellus; n = 36 in six groups) for three weeks exclusively on dry or fresh forage of low (lucerne), moderate (fresh timothy grass) or very high (bamboo leaves) silica content representing corresponding levels of phytoliths. We quantified the effect of these treatments with measurements from micro-computed tomography scans. Tooth height indicated extreme wear due to the bamboo diet that apparently brought maxillary incisors and molars close to the minimum required for functionality. There were negative relationships between a cheek tooth's height and the depth of its dentine basin, corroborating the hypothesis that dentine erosion plays an important role in herbivore tooth wear. In spite of lower body mass, bamboo-fed animals paradoxically had longer cheek tooth rows and larger occlusal surfaces. Because ever-growing teeth can only change in shape from the base upwards, this is a strong indication that failure to compensate for wear by dental height-growth additionally triggered general expansive growth of the tooth bases. The results suggest that enamel wear may intensify after enamel has been exposed due to a faster wear of the surrounding dentine tissue (and not the other way around), and illustrate a surprising plasticity in the reactivity of this rodent's system that adjusts tooth growth to wear.},
  articleno    = {20191921},
  author       = {Martin, Louise F. and Winkler, Daniela and Tütken, Thomas and Codron, Daryl and De Cuyper, Annelies and Hatt, Jean-Michel and Clauss, Marcus},
  issn         = {0962-8452},
  journal      = {PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES},
  keywords     = {General Biochemistry,Genetics and Molecular Biology,General Immunology and Microbiology,General Agricultural and Biological Sciences,General Environmental Science,General Medicine,dental wear,herbivory,growth,phytoliths,guinea pigs,plasticity,TOOTH SIZE,FED DIETS,TEETH,MAMMALS,INCISOR,GROWTH,DENTITIONS,EVOLUTION,PORCELLUS,RABBITS},
  language     = {eng},
  number       = {1912},
  pages        = {9},
  title        = {The way wear goes : phytolith-based wear on the dentine–enamel system in guinea pigs (Cavia porcellus)},
  url          = {http://dx.doi.org/10.1098/rspb.2019.1921},
  volume       = {286},
  year         = {2019},
}

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