Results 251 to 260 of about 11,967 (299)

Dentinal Lesions in Dogs with Dental Calculus

Journal of Comparative Pathology, 2021
Histopathological changes in tooth structures in dogs with calculus have not been described. The aim of this study was to evaluate the frequency of various histopathological changes in the dentine of teeth that had been surgically extracted from dogs with calculus.
Gabriela S.M. Assunção, Natália M. Ocarino, Luiz C. Sofal, Rogéria Serakides   +3 more
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Aspirated dental calculus in a dog

Journal of the American Veterinary Medical Association, 1992
Aspiration of a dental calculus, with lodgement of the calculus in a mainstem bronchus, was identified in a dog after dental prophylaxis. The calculus was located by use of radiography and bronchoscopy, and was removed via thoracotomy. Aspiration is a possible complication of dental prophylaxis.
K L, Gibson, C S, Hedlund
openaire   +2 more sources

Raman Spectra of Human Dental Calculus

Journal of Dental Research, 1993
Raman spectra of human dental calculus have been observed for the first time by use of micro-Raman spectroscopy. The spectral features of calculus were influenced easily by heating caused by laser irradiation. Therefore, the measurements were carried out at relatively low power (5 mW, 1-μm spot size).
H. Tsuda, J. Arends
openaire   +4 more sources

Fluorescence spectroscopy of dental calculus

Laser Physics Letters, 2010
The aim of the present study was to investigate the fluorescence properties of dental calculus in comparison with the properties of adjacent unaffected tooth structure using both lasers and LEDs in the UV-visible range for fluorescence excitation. The influence of calculus color on the informative signal is demonstrated.
S A Gonchukov, D. Bakhmutov, A. Sukhinina   +2 more
openaire   +2 more sources

The composition of dental calculus—III

Archives of Oral Biology, 1966
Abstract 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, M.F. Little, C.A. Casciani, J. Rowley   +3 more
openaire   +2 more sources

Distribution of Fluoride in Human Dental Calculus

Caries Research, 1993
The 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, Colin Robinson, John A. Weatherell, Haruo Nakagaki, F. Ito, H. Okumura   +5 more
openaire   +3 more sources

Hyaluronic acid in supragingival dental calculus

Calcified Tissue Research, 1977
A 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
openaire   +3 more sources

Ancient DNA analysis of dental calculus

Journal of Human Evolution, 2015
Dental 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.
openaire   +4 more sources

Constituents of Dental Calculus from Sheep

Nature, 1963
WHILE 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
openaire   +3 more sources

Scanning electron microscopy of dental calculus

Calcified Tissue Research, 1976
The 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, A. Shteyer, J. Lewin-Epstein   +2 more
openaire   +2 more sources