Dental Caries in the Albino Rat in Relation to the Chemical Composition of the Teeth and of the Diet II. Variations in the Ca/P Ratio of the Diet Induced by Changing the Phosphorus Content

Wynn, Winfrey; Haldi, John; Bentley, Katherine D.; Law, Mary L.; Ramsey, Doris

doi:10.1093/jn/58.3.325

Cited by 40 publications

(3 citation statements)

References 12 publications

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“…This was later confirmed (Sobel 1952) with cotton rats. Wynn et al (1956) fed a cariogenic (high sucrose) diet containing ample calcium (0.5%) and varying amounts of phosphorus to 23-dayold rats. In no case was the chemical composition of the enamel and dentine affected, but a progressive reduction in caries resulted as the calcium to phosphorus ratio of the diet changed from 1 to 0.5 to 1 to 1.5.…”

Section: Introductionmentioning

confidence: 99%

Wear in sheep's teeth

Barnicoat

1959

New Zealand Journal of Agricultural Research

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1025 SummaryExcessive wear of incisor teeth of sheep grazing high-fertility (European) pastures occurs in various parts of New Zealand.Chemical analyses were made of enamels and dentines separated from teeth of 5-year-old ewes bred on farms of different types in various areas. Estimations of calcium, phosphorus, carbonate, sodium, magnesium, nitrogen, citrate, and 19 micro-elements disclosed no differences.There were, however, significant differences in fluorine contents.Fluorine contents (whole teeth) varied from 28 to 320 p.p.m., the higher amounts being associated with teeth from ewes on pastures topdressed with phosphatic manures, which contain about 1% fluorine.The composition of the apatite "bone salt", (Ca3(P04),)n(CaCO,J),,, varied but slightly, the average values of n for enamel and dentine being 5.2 and 3.5 respectively.Variations in tooth quality (as judged by relative extent of wear) could not be correlated with differences in chemical composition. The average composition, incidentally, is remarkably similar to that recorded for human teeth.These results support the earlier theory that substances in the rapidly growing leaves of high-yielding grasses and clovers soften the teeth of sheep grazing them either by dissolving or chelating their inorganic constituents, or by other types of attack with enzymes. These destructive processes would probably be further increased by the abrasive action of fibre in the grasses.

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Section: Introductionmentioning

confidence: 99%

Wear in sheep's teeth

Barnicoat

1959

New Zealand Journal of Agricultural Research

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“…Some years ago, it was demonstrated that the development of dental decay in rats was accelerated when their diet was deficient in phosphorus (Wynn et al, 1956), calcium (Wynn et al, 1959), or both calcium and phosphorus. Caries was significantly reduced when the diet was made adequate in these elements.…”

Section: Enrichment Of Sugar Products and Caries-reducing Agentsmentioning

confidence: 99%

Enrichment of sugar and sugar products

Navia¹

1968

J. Agric. Food Chem.

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“…It seems reasonable to suppose that foods which contain soluble calcium or phosphate might protect the tooth, and experiments with animals have shown that the addition of sodium phosphate to a caries-producing diet reduces its effect (Wynn, Haldi, Bentley & Law, 1956)) but evidence on human caries is lacking.…”

Section: Dietary Influences On Acid Decalcijicationmentioning

confidence: 99%

Dental caries in relation to nutrition :environmental effects

1959

Proc. Nutr. Soc.

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Dental Caries in the Albino Rat in Relation to the Chemical Composition of the Teeth and of the Diet II. Variations in the Ca/P Ratio of the Diet Induced by Changing the Phosphorus Content

Cited by 40 publications

References 12 publications

Wear in sheep's teeth

Wear in sheep's teeth

Enrichment of sugar and sugar products

Dental caries in relation to nutrition :environmental effects

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