Старонка 1 ад 152 вынікі
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
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
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 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
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
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
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) 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
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
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
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
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