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Sayfa 1 itibaren 152 Sonuçlar

[Analyzing the production of organic acid of different genotype streptococcus mutans isolated from children with different caries experience].

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OBJECTIVE To compare the production of organic acid of different genotype Streptococcus mutans (S. mutans) isolated from children with different caries experience. METHODS 66 strains of S.mutans isolated from dental plaques of children aged from 3 to 5 with different caries experience were chosen as

Some characteristics of in vitro caries lesions induced in enamel by fluoride-containing organic acid buffers.

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[Characteristics of organic acids in the cavity of the stomach].

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[Elimination of the smear layer from the cavity walls by means of a dilute organic acid: SEM study].

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Clearance and metabolism of starch foods in the oral cavity.

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The presence of carbohydrates and organic acids was monitored in the oral cavity over a 3-hour period following the ingestion of six foods containing cooked starch (popcorn, potato chips, corn flakes, bread stick, hard pretzel and wheat cracker) and compared to a food containing sugar

The regional hydrolysis of ethyl acrylate to acrylic acid in the rat nasal cavity.

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Cytotoxicity is primarily limited to the olfactory epithelium of the dorsal meatus region of the nasal cavity of rodents following inhalation exposure to acrylic monomers. To investigate the biochemical basis for this effect, three regions of the Fischer F344N rat nasal cavity were evaluated for

[Ionized calcium in the saliva of children with multiple caries].

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Ionized calcium and total content of all Ca fractions were measured in mixed saliva and blood serum of children aged 4 to 12 with solitary carious lesions or multiple caries. The level of ionized Ca was much higher in multiple caries than in individual lesions, and the content of bound Ca

A hybrid computational fluid dynamics and physiologically based pharmacokinetic model for comparison of predicted tissue concentrations of acrylic acid and other vapors in the rat and human nasal cavities following inhalation exposure.

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To assist in interspecies dosimetry comparisons for risk assessment of the nasal effects of organic acids, a hybrid computational fluid dynamics (CFD) and physiologically based pharmacokinetic (PBPK) dosimetry model was constructed to estimate the regional tissue dose of inhaled vapors in the rat

Effects of ammonia and organic acids on the intradental sensory nerve activity.

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Ammonia and organic acids constitute a major part of the bacterial metabolites formed in carious decay. The aim of the present study was to investigate their effect on the intradental sensory nerves. Nerve impulse activity was recorded from canine teeth in cats after application of the test

Composition of pooled resting plaque fluid from caries-free and caries-susceptible individuals.

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The composition of pooled resting plaque fluid from 10 population samples, grouped according to age (8-11, 14-17, 18-25 years) and caries status (caries-free, CF, DMFS = 0; caries-susceptible, CS, DMFS greater than 10), was determined by means of ion chromatography. Subjects received a dental

[Glucosyltransferase (GTF) and immunization against dental caries in humans].

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Glucosyltransferase (GTF) is an extracellular or cell-associated enzyme synthesized by the "mutans" group of streptococci as well as the S. sanguis and is responsible for the biosynthesis of extracellular polysaccharides. Glucan formation in dental plaque mediates binding of S. mutans and S. sanguis

Effects of iron salts in sucrose on dental caries and plaque in rats.

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Anaemia caused by iron deficiency and dental caries are still among the most prevalent diseases in some developing countries. Anaemia can be prevented by iron fortification of food. Previous studies demonstrated that iron-sucrose, which has been used for prevention of anaemia, reduces the incidence

Effects of copper, iron and fluoride co-crystallized with sugar on caries development and acid formation in deslivated rats.

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The purpose was to explore the effects of combinations of copper, iron and fluoride (Cu, Fe and F) incorporated in sucrose by co-crystallization on caries development in the deslivated rat model and to examine acid formation by bacteria in the rat mouth. Ninety-six Sprague-Dawley rats were infected

Composition of pooled plaque fluid from caries-free and caries-positive individuals following sucrose exposure.

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The composition of pooled plaque fluid from five population samples was determined before and at selected times (7, 15, 30, and 60 min) after a 10% sucrose rinse. Subjects were grouped according to caries status (caries-free, CF, DMFS = 0; caries-positive, CP, DMFS > 10). Samples were also studied

Acid formation in sucrose-exposed dental plaque in relation to caries incidence in schoolchildren.

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The aim was to investigate the composition and concentration of organic acids produced by plaque bacteria in vivo and its possible relation to caries development in schoolchildren. Sucrose-exposed pooled plaque from 25 healthy teenagers was collected and the levels of Streptococcus mutans and

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