Search results
Results from the WOW.Com Content Network
Hydroxyapatite is widely used within dentistry and oral and maxillofacial surgery, due to its chemical similarity to hard tissue. [34] In the future, there are possibilities for using nano-hydroxyapatite for tissue engineering and repair. The main and most advantageous feature of nano-hydroxyapatite is its biocompatibility. [35]
Fluoride has a high tendency to react with the calcium hydroxyapatite Ca10(PO4)6(OH)2 in tooth enamel due to its high affinity to metals. [8] [10] It subsequently replaces the hydroxide group in hydroxyapatite to precipitate calcium fluorapatite Ca5(PO4)3)F. [8] These fluorapatite precipitations scavenge excess phosphate and calcium in the saliva to form a supersaturated solution for ...
Fluoride is present in small amounts in plants, animals, and some natural water sources. The additional fluoride in toothpaste has beneficial effects on the formation of dental enamel and bones. Sodium fluoride (NaF) is the most common source of fluoride, but stannous fluoride (SnF 2), and sodium monofluorophosphate (Na 2 PO 3 F) are also used ...
When fluoride ions are present in plaque fluid along with dissolved hydroxyapatite, and the pH is higher than 4.5, [16] a fluorapatite-like remineralised veneer is formed over the remaining surface of the enamel; this veneer is much more acid-resistant than the original hydroxyapatite, and is formed more quickly than ordinary remineralised ...
It builds a 3-D bio-matrix with binding sites for calcium ions serving as nucleation point for hydroxyapatite (tooth mineral) formation. The high affinity to tooth mineral is based on matching distances of Ca-ion binding sites on P11-4 and Ca spacing in the crystal lattice of hydroxyapatite.
Sodium monofluorophosphate is produced industrially by the reaction of sodium fluoride with sodium metaphosphate: [2] NaPO 3 + NaF → Na 2 PO 3 F. The process involves scission of a pyrophosphate bond, analogous to hydrolysis. SMFP can also be prepared by treating tetrasodium pyrophosphate or disodium phosphate with hydrogen fluoride. [2]
GlaxoSmithKline is using this material as an active ingredient in toothpaste under the commercial name NovaMin, which can help repair tiny holes and decrease tooth sensitivity. [ 11 ] [ 14 ] More advanced fluoride-containing formulations of Bioglass have been developed, which provide stronger and longer-lasting protection against sensitivity.
Fluoride therapy typically uses the sodium fluoride form, though stannous fluoride may also be used. [4] [5] Fluoride decreases breakdown of teeth by acids, promotes remineralisation, and decreases the activity of bacteria. [5] Fluoride works primarily through direct contact with teeth. [3] [5] Fluoride came into use to prevent tooth decay in ...