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Download PDF by Roderick A. Cawson, Edward W. Odell: Cawson's Essentials of Oral Pathology and Oral Medicine

By Roderick A. Cawson, Edward W. Odell

ISBN-10: 0443071055

ISBN-13: 9780443071058

This new and carefully revised version of Cawson's necessities of Dental surgical procedure and Pathology has been restructured to keep on with the trendy instructing specialise in oral pathology and oral medication. Extraneous fabric has been dropped and the wishes of ultra-modern pupil are addressed. Readers will locate totally up-to-date assurance all through, really on AIDS, molecular biology, alleged mercury dangers, tumors, and administration.

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Example text

Miller showed that lesions similar to dental caries could be produced by incubating teeth in saliva when carbohydrates were added. Miller concluded that caries could result from decalcification caused by bacterial acid production followed by invasion and destruction of any remaining tissue. Though he took a laudably cautious view as to how these findings should be interpreted, Miller's basic hypothesis has been upheld, even though the infective nature of the disease was not confirmed until 1954 when Orland and his associates in the USA showed that caries did not develop in germ-free animals.

However, when fluoride levels are excessively high (over 8 ppm), as in parts of India, mottling of deciduous teeth may be seen. With severe mottling of the enamel, other effects of excessive fluoride intake, especially sclerosis of the skeleton, may develop. Radiographically, increased density of the skeleton may be seen in areas where the fluoride content of the water exceeds 8 ppm. 34. Mild dental fluorosis is not readily distinguishable from nonfluoride defects and non-specific defects are more common in areas where the water contains less than 1 ppm of fluorine.

This is shown by mottling of the enamel produced by excessive levels of fluoride. However, it is believed that the lower incidence of dental caries where water is fluoridated is due to its continued environmental effect on the teeth to reduce solubility of the enamel and promote remineralisation. These effects may be more important than the effect of fluoride on structure. Fluoride is the only nutrient which has been proved to have this protective action. Despite the difficulties in distinguishing the degree of resistance of the teeth from the virulence of their cariogenic environment, it has become clear that fluorides have had a major impact on caries prevalence.

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Cawson's Essentials of Oral Pathology and Oral Medicine by Roderick A. Cawson, Edward W. Odell

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