Enamel apatite crystallinity significantly contributes to mammalian dental adaptations

Abstract The monophyodont molar teeth, prismatic enamel and the complexity of enamel microarchitecture are regarded as essential dental apomorphies of mammals. As prominent background factors of feeding efficiency and individual longevity these characters are crucial components of mammalian adaptive...

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Autores principales:	Anna Kallistová, Roman Skála, Miroslav Šlouf, Petr Čejchan, Irena Matulková, Ivan Horáček
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f44832c230b54de08b0da447f8c943b3
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spelling	oai:doaj.org-article:f44832c230b54de08b0da447f8c943b32021-12-02T15:08:54ZEnamel apatite crystallinity significantly contributes to mammalian dental adaptations10.1038/s41598-018-23826-02045-2322https://doaj.org/article/f44832c230b54de08b0da447f8c943b32018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-23826-0https://doaj.org/toc/2045-2322Abstract The monophyodont molar teeth, prismatic enamel and the complexity of enamel microarchitecture are regarded as essential dental apomorphies of mammals. As prominent background factors of feeding efficiency and individual longevity these characters are crucial components of mammalian adaptive dynamics. Little is known, however, to which degree these adaptations are influenced by the crystallographic properties of elementary hydroxyapatite crystallites, the only inorganic component of enamel. In a miniature pig where individual molars differ significantly in duration of their development and in enamel resistance to attrition stress, we found highly significant differences between the molars in the size of crystallites, amount of microstrain, crystallinity and in enamel stiffness and elasticity, all clearly scaled with the duration of tooth calcification. The same pattern was found also in red deer bearing different molar type. The results suggest that the prolongation of tooth development is associated with an increase of crystallinity, i.e. the atomic order of enamel hydroxyapatite, an obvious component of micromechanical property of mature enamel. This relation could contribute to prolongation of dental development, characteristic of mammals in general. The aspects of enamel crystallinity, omitted in previous studies on mammalian and vertebrate dental evolution, are to be taken in account in these topics.Anna KallistováRoman SkálaMiroslav ŠloufPetr ČejchanIrena MatulkováIvan HoráčekNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anna Kallistová Roman Skála Miroslav Šlouf Petr Čejchan Irena Matulková Ivan Horáček Enamel apatite crystallinity significantly contributes to mammalian dental adaptations
description	Abstract The monophyodont molar teeth, prismatic enamel and the complexity of enamel microarchitecture are regarded as essential dental apomorphies of mammals. As prominent background factors of feeding efficiency and individual longevity these characters are crucial components of mammalian adaptive dynamics. Little is known, however, to which degree these adaptations are influenced by the crystallographic properties of elementary hydroxyapatite crystallites, the only inorganic component of enamel. In a miniature pig where individual molars differ significantly in duration of their development and in enamel resistance to attrition stress, we found highly significant differences between the molars in the size of crystallites, amount of microstrain, crystallinity and in enamel stiffness and elasticity, all clearly scaled with the duration of tooth calcification. The same pattern was found also in red deer bearing different molar type. The results suggest that the prolongation of tooth development is associated with an increase of crystallinity, i.e. the atomic order of enamel hydroxyapatite, an obvious component of micromechanical property of mature enamel. This relation could contribute to prolongation of dental development, characteristic of mammals in general. The aspects of enamel crystallinity, omitted in previous studies on mammalian and vertebrate dental evolution, are to be taken in account in these topics.
format	article
author	Anna Kallistová Roman Skála Miroslav Šlouf Petr Čejchan Irena Matulková Ivan Horáček
author_facet	Anna Kallistová Roman Skála Miroslav Šlouf Petr Čejchan Irena Matulková Ivan Horáček
author_sort	Anna Kallistová
title	Enamel apatite crystallinity significantly contributes to mammalian dental adaptations
title_short	Enamel apatite crystallinity significantly contributes to mammalian dental adaptations
title_full	Enamel apatite crystallinity significantly contributes to mammalian dental adaptations
title_fullStr	Enamel apatite crystallinity significantly contributes to mammalian dental adaptations
title_full_unstemmed	Enamel apatite crystallinity significantly contributes to mammalian dental adaptations
title_sort	enamel apatite crystallinity significantly contributes to mammalian dental adaptations
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/f44832c230b54de08b0da447f8c943b3
work_keys_str_mv	AT annakallistova enamelapatitecrystallinitysignificantlycontributestomammaliandentaladaptations AT romanskala enamelapatitecrystallinitysignificantlycontributestomammaliandentaladaptations AT miroslavslouf enamelapatitecrystallinitysignificantlycontributestomammaliandentaladaptations AT petrcejchan enamelapatitecrystallinitysignificantlycontributestomammaliandentaladaptations AT irenamatulkova enamelapatitecrystallinitysignificantlycontributestomammaliandentaladaptations AT ivanhoracek enamelapatitecrystallinitysignificantlycontributestomammaliandentaladaptations
_version_	1718387975996309504

Enamel apatite crystallinity significantly contributes to mammalian dental adaptations

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