Results 111 to 120 of about 40,865 (136)
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A microbiological study of dental calculus.
Journal of Periodontal Research, 1978The flora of 16 supragingival and 11 subgingival calculus samples from 20 patients was studies using both selective media incubated aerobically and anaerobically. 767 representative isolates, from a total of 1,320 were charaterised and 653 assigned to genera or species.Gram‐positive organisms present in >50% of all samples were Streptococcus sanguis
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The composition of dental calculus—III
Archives of Oral Biology, 1966Abstract 4192 individual samples of supragingival calculus from the molar and lingual areas were analysed both chemically and chromatographically for the amino acid and saccharide composition. The nitrogen content of upper molar was consistently higher than that of lower anterior calculus.
L. Bowman +3 more
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Distribution of Fluoride in Human Dental Calculus
Caries Research, 1993The distribution of fluoride in human dental calculus was investigated using a mechanical sampling technique and the fluoride electrode. The fluoride concentrations were highest at the outer surface of dental calculus and, then fell to a plateau for the interior of the calculus, rising again as the tooth surface was approached.
Kazuto Kato +5 more
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Hyaluronic acid in supragingival dental calculus
Calcified Tissue Research, 1977A method is described for the isolation of heteropolysaccharides from human supragingival calculus. One component was identified as hyaluronic acid, by electrophoretic mobility, testicular hyaluronidase digestion and cetylpyridinium chloride profiles. No sulphated glycosaminoglycans were detected.
G. Embery, E. Whitehead
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Ancient DNA analysis of dental calculus
Journal of Human Evolution, 2015Dental calculus (calcified tartar or plaque) is today widespread on modern human teeth around the world. A combination of soft starchy foods, changing acidity of the oral environment, genetic pre-disposition, and the absence of dental hygiene all lead to the build-up of microorganisms and food debris on the tooth crown, which eventually calcifies ...
Weyrich, L., Dobney, K., Cooper, A.
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Constituents of Dental Calculus from Sheep
Nature, 1963WHILE the crystalline composition of dental calculus in man is well elucidated, very little is known about such calculus in animals. We have had the opportunity of comparing the results of X-ray diffraction examinations of samples of dental calculus from sheep from Dundee, Scotland, and from Greenland.
Augusta Unmack, S. L. Rowles
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Diet and the aetiology of dental calculus
International Journal of Osteoarchaeology, 1999The aetiology of dental calculus formation is not fully understood, but it is known that a number of factors play a role. Generally, anthropologists have overlooked the role of other causative factors in the formation of dental calculus, attributing it almost exclusively to diet, particularly protein consumption.
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Scanning electron microscopy of dental calculus
Calcified Tissue Research, 1976The morphologic structure of anorganic dental calculus was studied by means of the scanning electron microscope. From surface observations, calculus is apparently composed of two components with distinguishable patters of calcification. One component is formed by the precipitation of minute calcific crystals on microorganisms and intermicrobial ...
J. Lustmann +2 more
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Ancient dental calculus and diet
Human Evolution, 1996Dental calculus has been often considered as a consequence of dietary habits, mainly related to the post Neolitic agricultural development. The presence of fossilized bacteria in the Kebara 2 teeth, aged 60.000 years BP, and the similarity of oral pathologies in pre and post Neolithic samples confirm the multifactorial etiology of oral diseases in ...
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Journal of Veterinary Dentistry, 1995
Recently we reported that feline and canine dental calculus fluoresced pink to red under long wavelength ultraviolet light due to the presence of porphyrin.1 Here we report the observation of such fluorescence in 30 of 30 cats, 30 of 30 dogs, and 8 of 13 supragingival samples and 5 of 5 subgingival samples of humans.
William C. Dolowy +4 more
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Recently we reported that feline and canine dental calculus fluoresced pink to red under long wavelength ultraviolet light due to the presence of porphyrin.1 Here we report the observation of such fluorescence in 30 of 30 cats, 30 of 30 dogs, and 8 of 13 supragingival samples and 5 of 5 subgingival samples of humans.
William C. Dolowy +4 more
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