The Adsorption of Fluorides by Enamel, Dentin, Bone, and Hydroxyapatite as Shown by the Radioactive Isotope*
نویسندگان
چکیده
Evidence has recently appeared from three diverse sources that fluorine is in some way related to the inhibition of dental caries. First, chemical analyses have shown that sound enamel from sound teeth contains more fluorine than that from carious teeth (1); this is the only established chemical difference between sound and carious tissues. Second, field studies have shown a lower incidence of caries in areas of mottled enamel (dental fluorosis (2,3)). Third, in animal experimentation, rats have been found to develop less caries on a caries-producing diet when fluorine is added to the diet (4, 5). Two factors in the inhibiting action of fluorine have been discovered: (a) fluorine reduces the acid production of oral bacteria (6) and (b) fluorine reduces the solubility of the dental tissues (7). Since human dental caries begins on the surface of the enamel, it is important to explore the possibility that fluorides are adsorbed on the surface. To investigate this problem, samples of powdered enamel, dentin, bone, and hydroxyapatite were exposed to solutions of sodium fluoride. The amount of fluorine picked up by these calcium phosphates was found to follow the adsorption isotherm, thus demonstrating that fluorine does adsorb on dental tissues.
منابع مشابه
The adsorption of strontium at forty degrees by enamel, dentin, bone, and hydroxyapatite as shown by the radioactive isotope.
متن کامل
Theories on the mode of action of fluoride in reducing dental decay.
Several properties of the fluoride ion at physiological concentrations are known which may be concerned with its actions in reducing dental caries. T h e properties that have been most thoroughly studied as a basis of the anticaries action are: (I) the incorporation of fluoride in the hydroxyapatite of the calcified tissues, both during and after their formation, thus increasing the proportion ...
متن کاملA Review of the properties, synthesis and application of Nano Hydroxyapatite
Nano-Hydroxyapatite (nHAP) is a very valuable mineral that is widely used in tissueengineering as well as bone and dental repair. Moreover, it is a major component of bone, enamel and dentin that can interact effectively with healing tissues due to its high biocompatibility. It is important to note that the purpose of its medical application can be identified based on the structure and sy...
متن کاملPolystyrene-Hydroxyapatite Nanocomposite as a New Adsorbent of Aflatoxin M1
Background & Aims: Aflatoxin M1 is one of the most important toxins present in milk and the product of aflatoxin B1 metabolism in liver microsomes. The aim of this project was to study the aflatoxin M1 adsorption ability of polystyrene-hydroxyapatite nanocomposite. Methods: First, the probability of aflatoxin M1 adsorption by the nanocomposite was evaluated us...
متن کاملPolystyrene-Hydroxyapatite Nanocomposite as a New Adsorbent of Aflatoxin M1
Background & Aims: Aflatoxin M1 is one of the most important toxins present in milk and the product of aflatoxin B1 metabolism in liver microsomes. The aim of this project was to study the aflatoxin M1 adsorption ability of polystyrene-hydroxyapatite nanocomposite. Methods: First, the probability of aflatoxin M1 adsorption by the nanocomposite was evaluated using the HyperChem simulation softwa...
متن کامل