نتایج جستجو برای: calcium fluoride
تعداد نتایج: 186116 فیلتر نتایج به سال:
Objective: This study aimed to compare the effect of using Casein phosphopeptide – amorphous calcium phosphate (CPP-ACP) paste, Remin-Pro and Fluoride Varnish on remineralization of enamel lesions. Methods: In this experimental-in vitro study, 60 intact premolars and molars were used and flat enamel surfaces were prepared. The specimens were divided into 6 groups (N=10). After primary DIAGNO...
According to SCHOUR and SMITH (1934), in ground sections viewed microscopically with transmitted light, enamel and dentin showed light (disturbed) and dark (recovery) incremental layers for each injection of sodium fluoride. IRVING (1943) injected fluoride in different doses in an attempt to estimate its effect on the basis of the amount per kilogram of body weight of the animal. Both hypocalci...
Fluoride in drinking water has a profound effect on teeth and bones. Up to a small level (1-1.5mg/L) this strengthens the enamel. Concentrations in the range of 1.5-4 mg/L result in dental fluorosis whereas with prolonged exposure at still higher fluoride concentrations (4-10mg/L) dental fluorosis progresses to skeletal fluorosis. High fluoride concentrations in groundwater, up to more than 30 ...
Fluoride excess in drinking water is noticed many countries around the world and particularly Senegal where, addition to fluoride excess, high levels of salinity are also encountered. In order reduce groundnut basin Senegal, two types clays namely montmorillonite KSF K10 as well were used adsorbent materials. The results show that pH which was initially alkaline becomes acidic varying from 2.80...
The results of studies on the biological influence of magnetic fields are controversial and do not provide clear answers regarding their impact on cell functioning. Fluoride compounds are substances that influence free radical processes, which occur when the reactive forms of oxygen are present. It is not known whether static magnetic fields (SMF) cause any changes in fluoride assimilation or a...
The primary aim of this work is to present the available evidence that toothpastes containing >1,500 ppm fluoride (2,500-2,800 and 5,000 ppm F) provide an additional caries preventive effect on root caries lesions in elderly patients compared to traditional dentifrices (1,000-1,450 ppm F). The secondary aim of this paper is to discuss why high fluoride dentifrices in general should perform bett...
BACKGROUND This study aimed to investigate the effects of a fluoride varnish with added Casein Phosphopeptide-Amorphous Calcium Phosphate (CPP-ACP) treatments on acid resistance of primary teeth enamel. METHODS Enamel specimens obtained from 40 primary incisors (for surface microhardness testing) and 40 primary molars (for demineralization depth measurement) were randomly divided into four gr...
The aim of this study was to investigate the sol gel synthesis of HA/FA nanoparticles and the possible formation of TCP phase or unstoichiometric calcium deficient hydroxyapatite (CDHA) from the precursors with a Ca/P ratio of 1.62. In order to prepare the sol, the solutions of Triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol were used respectively as P, F and Ca precursors....
The soluble inorganic salts of fluoride are recognized to be highly toxic when administered parenterally or per os to animals or humans.15' 18,20 When taken in sufficiently large amounts such compounds may prove fatal within a matter of minutes. The fluoride ion appears to be an enzyme poison. 9'22' 34 It is known, for example, that fluoride added to suitable preparations of tissues or plants i...
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