It deposits a layer of antimicrobial silver that resists acids produced by bacteria and promotes the formation of hydroxyapatite and fluorapatite
; i.e., the remineralization process.
However, this data must be interpreted with caution owing to the fact that calcium fluoride-like particles (Ca[F.sub.2]) are the most abundant source of free ions during cariogenic challenges, forming a reservoir of F, which are subsequently incorporated into enamel as hydroxyfluorapatite or fluorapatite
. (25) During a pH-cycling regimen, due to the continued de-remineralization episodes, most of this reservoir is lost; therefore, Ca[F.sub.2]-like particles might act as a reservoir on the enamel surface, and F is lost during pH-cycling.
X-ray peak profile analysis of nanostructured hydroxyapatite and fluorapatite
. International Journal of Bioscience, Biochemistry and Bioinformatics.
HA and Zr[O.sub.2] interaction was prevented by dispersing 15 g of homemade fluorapatite
, 1 g of triethyl phosphate, and 6 g of polyvinyl butyl in distilled water and mixing for 24 hours.
The primary crystal types today are leucit, lithium disilicate and fluorapatite
. Leucite is created in dental porcelain by increasing the potassium oxide (chemical formula K2O) content of the aluminosilicate glass.
For example, Guidry and Mackenzie (2003) used a fluidised bed and stirred tank reactor to measure the dissolution rate of igneous fluorapatite
over a range of temperature and pH.
Bertinetti et al., "Textured fluorapatite
bonded to calcium sulphate strengthen stomatopod raptorial appendages," Nature Communications, vol.
Aida, "A comparative study of structural stability and mechanical and optical properties of fluorapatite
[([ca.sub.5]([po.sub.4]).sub.3]f) and lithium disilicate [([li.sub.2][si.sub.2][o.sub.5]) components forming dental glassceramics: first principles study," Journal of Electronic Materials, vol.
Many hydrothermal uranium (U) ores are accompanied by high concentrations of fluorine (F) in the form of fluorite and/or other F-bearing minerals such as fluorapatite
The uptake mechanism of [sup.18]F-NaF is by chemisorption to hydroxyapatite, with resultant conversion into fluorapatite
and a hydroxyl group.
It has been reported that neutral NaF solutions with fluoride concentrations of 100 ppm or less primarily resulted in the formation of fluorapatite
, whereas higher fluoride concentrations resulted in the formation of calcium fluoride on the enamel surface .
The TCG activity focuses primarily on the chemical fertilizers and phosphoric acid production, by the fluorapatite