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Mechanics of longitudinal cracks in tooth enamel
Acta Biomaterialia, 2011A study is made of longitudinal "channel" cracking in tooth enamel from axial compressive loading. The cracks simulate those generated in the molar and premolar teeth of humans and animals by natural tooth function. Contact loading tests are made on extracted human molars with hard and soft indenting plates to determine the evolution of such cracks ...
A, Barani +5 more
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Dose rate assessment in tooth enamel
Quaternary Science Reviews, 1988Abstract A mammoth found in the southern part of Germany was dated by ESR spectroscopy. This dating method is based on the measurement of the accumulated dose in tooth enamel and assessment of the annual dose. The accumulated dose is obtained from the radiation induced ESR signal at g = 2.0018 of the enamel.
Wieser, A. +3 more
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Some observations of tooth enamel surfaces
Archives of Oral Biology, 1960Abstract The relatively flat portions of the labial surfaces of human central incisor teeth were polished with various abrasives, in an attempt to produce consistently reproducible surfaces for the comparison of the effects of various treatments.
L S, FOSDICK +2 more
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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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Measurement of translucency of tooth enamel and dentin
Acta Odontologica Scandinavica, 2009To determine the translucency of human and bovine enamel and dentin using reflection spectrophotometers.The color of intact human and bovine enamel and dentin specimens was measured over a white and a black plasticine backing using two spectrophotometers with different aperture sizes; translucency parameter (TP) and contrast ratio (CR) were calculated.
Bin, Yu, Jin-Soo, Ahn, Yong-Keun, Lee
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Photography and a study of the mottling of tooth enamel
Journal of Audiovisual Media in Medicine, 1983Development of an intra-oral photographic system led to the proposal that colour transparencies would be suitable as a basis for the assessment of mottling on tooth enamel. A study involving 160 school children was successfully carried out in Vordingborg, Denmark.
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Magnesium in tooth enamel and synthetic apatites
Calcified Tissue International, 1986The literature on how Mg is present in tooth enamel and on the incorporation of Mg in synthetic apatites is reviewed. Then a theoretical consideration is given on the basis of ionic radii about the incorporation of Mg in F-, Cl- and OH-apatite. Finally, the results are given of experiments on the incorporation of Mg in fluor, chlor, hydroxy, and ...
R A, Terpstra, F C, Driessens
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The evolution of dinosaur tooth enamel microstructure
Biological Reviews, 2010The evolution of tooth enamel microstructure in both extinct and extant mammalian groups has been extensively documented, but is poorly known in reptiles, including dinosaurs. Previous intensive sampling of dinosaur tooth enamel microstructure revealed that: (1) the three-dimensional arrangement of enamel types and features within a tooth-the ...
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Improvements in dating tooth enamel by ESR
Applied Radiation and Isotopes, 2000ESR dating requires that growth curves be determined by interpreting complex spectra. Spectra, however, can vary significantly in shape and field position between different samples, or occasionally between subsamples, even though the mineralogy remains the same.
A R, Skinner +4 more
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Persistence of immature enamel in an embedded tooth
Oral Surgery, Oral Medicine, Oral Pathology, 1956Abstract 1. 1. Observations on an inverted tooth which had remained embedded in the lower jaw for over forty years are reported. These observations show that the tooth suffered an injury in early infancy. 2. 2. The enamel and dentine formed before the time of injury remained in their immature states during the whole forty-year period, while ...
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