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Biomineralization: Tooth Enamel Formation
2012Tooth enamel is composed of well-crystallized apatite that elongates in the c-axis direction with a highly organized orientation. How do these crystals form? It is still an unanswered question, despite enormous efforts made on answering it.
Mayumi Iijima, Kazuo Onuma, Toru Tsuji
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Conductivity in human tooth enamel
Journal of Materials Science, 1999When human tooth enamel is heated either in vacuum or air it presents drastic changes in electrical susceptibility, conductivity and structural properties. In this paper we report an insulator-conductive transition which is observed in air around 350°C where enamel conductivity changes drastically and its electrical resistance decreases from 1015 to ...
J. Reyes-Gasga +4 more
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Rehardening of softened tooth enamel
Archives of Oral Biology, 1962Abstract Measurements of the hardness of enamel provide a sensitive measure of changes in the enamel surface. Ground surface enamel has a hardness of about 300 Knoop hardness numbers (KHN). When teeth are exposed to 0.001 n lactate buffer at pH 5.0, the hardness decreases linearly to about 100 KHN in 10 to 12 hr at 35 °C.
Ward Pigman, T. Koulourides, H. Cueto
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A Study of Saliva and Its Action on Tooth Enamel in Reference to Its Hardening and Softening
The Dental register, 1912Enamel softening has been considered to be necessarily associated with roughening of the surface, loss of luster and dissolution of the cemental substance that binds the enamel rods together; and whenever enamel decalcification is associated with decay ...
J. Head
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Spherical indentation of tooth enamel
Journal of Materials Science, 1981Spherical indentation measurements were made on enamel surfaces of intact human teeth. From the load versus depth of indentation curve Young's modulus was found to be typically 8.3×1010 Pa and the yield stress to be 3.3×108 Pa. Young's modulus was observed to vary with moisture content and with the orientation of the enamel surface.
M. Staines +2 more
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Nuclear Tracks and Radiation Measurements (1982), 1985
Abstract Tooth enamel, consisting of hydroxyapatite, is a very useful natural material for ESR dating. It occurs widely in archeological and geological deposits, has a low internal U content, and a long lifetime for trapped electrons. Examples are given of its use in dating some archeological sites.
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Abstract Tooth enamel, consisting of hydroxyapatite, is a very useful natural material for ESR dating. It occurs widely in archeological and geological deposits, has a low internal U content, and a long lifetime for trapped electrons. Examples are given of its use in dating some archeological sites.
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The British Journal of Radiology, 1936
X-ray examination of tooth enamel has shown that the apatite crystals, of which the enamel is composed, are preferentially oriented. The crystals are so arranged that their hexagonal axes tend to be parallel to the same direction—the fibre-axis. In dogs' teeth the fibre-axis is at right-angles to the tooth surface.
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X-ray examination of tooth enamel has shown that the apatite crystals, of which the enamel is composed, are preferentially oriented. The crystals are so arranged that their hexagonal axes tend to be parallel to the same direction—the fibre-axis. In dogs' teeth the fibre-axis is at right-angles to the tooth surface.
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Synthetic tooth enamel has bite
C&EN Global Enterprise, 2017Scientists have created a new synthetic material with the properties of tooth enamel, setting the stage for advances in tooth repair or replacement (Nature 2017, DOI: 10.1038/nature21410). Tooth enamel from all species has a similar structure: microsized ceramic columns in a soft protein matrix. An international team led by Nicholas A.
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Tooth Enamel: Current State of the Art
Journal of Dental Research, 1979Important progress has been made relative to the growth, structure and function of enamel. Better understanding of the epithelial mesenchymal interactions during odontogenesis has been gained through tissue culture, and the predominant role of the dental papilla has been established.
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An Epidermis-like Hierarchical Smart Coating with a Hardness of Tooth Enamel.
ACS Nano, 2018Xiaodong Qi +7 more
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