Results 211 to 220 of about 49,357 (263)

Dental Enamel Electrochemistry

Journal of Dental Research, 1973
The results of several experiments implicate electrochemical phenomena in the formation of dental caries. The passage of an electric current through enamel causes degradation and a carious appearance. The fluoride ion minimizes the variations in natural electric potentials and inhibits electric current.
R A, Dickerson, J M, Lenoir
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Enamel Opacities and Dental Esthetics

Journal of Public Health Dentistry, 1995
Abstract Objectives: The purpose of this study was to determine the esthetic importance of different types of developmental enamel defect. Methods: In the first method used, individual subjects from three different populations with less than 0.1, 0.7, and 0.9 ppm fluoride in their drinking water, were asked about the appearance of their teeth and ...
R P, Ellwood, D, O'Mullane
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Dental Caries and Enamel Structure

Nature, 1966
A GENERALLY accepted feature of the histology of ground sections of carious lesions in human dental enamel is the so called ‘dark zone’. This zone, which lies at the border of the lesion, between the main body and the translucent zone or normal enamel, shows positive birefringence when the section is placed in quinoline and viewed by polarized light ...
H S, Crabb, K V, Mortimer
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Demineralization and Remineralization of Dental Enamel _____

Journal of Dental Research, 1979
Experimentation in vitro using organic acid buffers as demineralizing media shows that caries-like lesions can be obtained which are very similar in morphology and developmental stages to early lesions formed naturally under oral conditions. The use of these chemical systems and of mechanistic models advanced to explain the unique histological features
E C, Moreno, R T, Zahradnik
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Proteomics and Genetics of Dental Enamel

Cells Tissues Organs, 2005
The initiation of enamel crystals at the dentino-enamel junction is associated with the expression of dentin sialophosphoprotein (<i>DSPP,</i> a gene normally linked with dentin formation), three ‘structural’ enamel proteins – amelogenin <i>(AMELX),</i> enamelin <i>(ENAM),</i> and ameloblastin <i>(AMBN)</i ...
Jan C-C, Hu, Yasuo, Yamakoshi, Fumiko, Yamakoshi, Paul H, Krebsbach, James P, Simmer   +4 more
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Strontium Incorporation into Dental Enamel

Science, 1966
Rats were raised on diets either rich or poor in strontium. Powder x-ray diffraction patterns suggest that isomorphous substitution of strontium for calcium occurs in the apatite of tooth enamel, and that strontium may form Sr 6 H 3 (PO 4 ) ⋅ 2H 2
A R, Johnson, W D, Armstrong, L, Singer
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Strategies and Challenges in the Treatment of Dental Enamel

Cells Tissues Organs, 2022
Enamel tissue, the hardest body tissue, which covers the outside of the tooth shields the living tissue, but it erodes and disintegrates in the acidic environment of the oral cavity. On the one hand, mature enamel is cell-free and, if damaged, does not regenerate. Tooth sensitivity and decay are caused by enamel loss.
Elaheh Dalir Abdolahinia, Sadaf Ilbeygi Taher, Parnaz Abdali Dehdezi, Atefe Ataei, Majid Azizi, Narges Afra, Samira Afshar Fard, Simin Sharifi   +7 more
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Trapped Water of Dental Enamel

Nature, 1965
RECENT investigations with polarizing microscopy have indicated that some of the water of dental enamel is not easily removed by dehydrating methods. Somewhat more severe treatment of enamel is necessary to remove the last portion of water and these more drastic conditions bring about irreversible changes in enamel1.
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Dental enamel regeneration

2014
Enamel formation Enamel is the outermost covering of vertebrate teeth and the hardest tissue in the vertebrate body. During tooth development, ectoderm-derived ameloblast cells create enamel by synthesizing a complex protein mixture into the extracellular space where the proteins self-assemble to form a matrix that patterns the woven hydroxyapatite ...
Xanthippi Chatzistavrou, Petros Papagerakis   +1 more
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The prevalence of dental caries, enamel opacities and enamel hypoplasia in Ugandans

Archives of Oral Biology, 1972
Abstract An epidemiological survey on the prevalence of dental caries, enamel opacities and enamel hypoplasia was conducted on 1399 persons in four districts in Uganda with fluoride in the drinking water varying from 0.11 to 3.00 ppm. The dental caries experience was found to be very low (0.0–0.9 DMF-T per person in the 5–9 yr age group and 0.4–2.8 ...
I J, Moller, J J, Pindborg, B, Roed-Petersen   +2 more
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