We have measured the decay of NMR multiple quantum coherence intensities both under the internal dipolar Hamiltonian as well as when this interaction is effectively averaged to zero, in the cubic calcium fluoride CaF2 spin system and the pseudo-one-dimensional system of fluoroapatite. In calcium fluoride the decay rates depend both on the number of correlated spins in the cluster, as well as on...

Dental caries is a bacterially based disease that progresses when acid produced by bacterial action on dietary fermentable carbohydrates diffuses into the tooth and dissolves the mineral, that is, demineralization. Pathological factors including acidogenic bacteria (mutans streptococci and lactobacilli), salivary dysfunction, and dietary carbohydrates are related to caries progression. Protecti...

This study aimed to examine the anti-demineralization capacities of (a) tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) and 950 ppm fluoride paste, (b) casein phosphopeptide amorphous calcium phosphate paste and (c) 950 ppm fluoride solution using optical coherence tomography (OCT). Enamel blocks were cut from the bovine incisors and treated using one of the above-mention...

We support lowering the levels of fluoride in the drinking water, but believe that 0.7ppm isn’t low enough. We believe that Connecticut residents, particularly children, will not be safe from overexposure to fluoride chemicals until the artificial fluoridation of the public water supply is prohibited; leaving only trace amounts of naturally occurring calcium fluoride in the groundwater, usually...

osteoporosis as a skeletal disorder characterize by compromised bone strength predisposing a person to an increased risk of fracture. all people should be encouraged to take efforts to prevent bone loss and fractures. nutrition is one of several factors that can be modified to reduce osteoporosis risk. the purpose of this review article is assessment the role of the other nutrients the exceptio...

The aim of this study was to evaluate the effect of fluoride varnishes containing tri-calcium phosphate on remineralization of primary enamel lesions. Forty-eight sound primary incisors were coated with nail varnish, leaving two 1 x 1 mm windows before being placed in a demineralizing solution for four days. After demineralization, all the specimens were coated with nail varnish over one of the...

Like many elements, fluorine (which generally occurs in nature as fluoride) is beneficial to human health in trace amounts, but can be toxic in excess. The links between low intakes of fluoride and dental protection are well known; however, fluoride is a powerful calcium-seeking element and can interfere with the calcified structure of bones and teeth in the human body at higher concentrations ...

The aim of this study was to determinate the influence of fluoride, released by all of the restorative materials in the process of remineralization. To achieve this, we measured the concentration of the incorporated fluoride and calcium in dentin. The research was done on 80 extracted third molars, in which we prepared first-class cavities. After the process of decalcination, we split the teeth...

Calcium fluoride solid electrolytes have been identified as a candidate for solid-state fluoride-ion batteries (FIBs). Here, we investigate the doping of CaF2 with samarium — Ca1−xSmxF2+x (0 ≤ x 0.15) obtained by synthesis via high-energy ball milling. Structural, morphological, and ionic conductivity studies as-prepared materials were examined. It reveals that fluorite-type structure is domina...