Purpose: To evaluate the effectiveness in reducing dentin hypersensitivity (DH) of a commercial toothpaste containing 8% arginine, calcium carbonate and fluoride when applied by a dental professional immediately prior to a professional dental prophylaxis and again after subjects brushed twice daily with the toothpaste at home for 2 weeks, and …
This result may come as a surprise, since BM does not contain HA, rather than calcium phosphate carbonate citrate fluoride as per manufacturer's specifications, that is, Cit-ACP.
To test the calcium fluoride layer's persistence and stability, samples were exposed to the spray of a dental multifunctional syringe for 20 s using maximum pressure and maximum water supply ...
Calcium from limestone is an important element in Portland cement. Solubility of the carbonate in water containing carbon dioxide is high, which causes the formation of caves with stalactites and stalagmites and is responsible for hardness in water. Other important compounds are the carbide, chloride, cyanamide, hypochlorite, nitrate, and sulfide.
The total concentration of calcium-containing species, times two, must be equal to the total concentration of fluorine-containing species. Equation $(5)$ comes from the fact that the system must be electrically neutral, i.e. the positive charges are the same as the negative charges.
Calcium carbonate and calcium fluoride are both sparingly soluble in water; however, the solubility product of fluorite is about two orders of magnitude lower than for …
A compound's molar solubility in water can be calculated from its Kₛₚ value at 25°C. To do so, first prepare an ICE (Initial, Change, and Equilibrium) table showing the equilibrium …
Calcium carbonate is an inorganic salt primarily used to manage and treat low calcium conditions, GERD, CKD, and other indicated conditions. Calcium carbonate is classified as a calcium supplement, …
Bone is a calcium reservoir in the body in the form of hydroxyapatite (HA) (85%), calcium carbonate (10%), calcium fluoride (∼3%), and magnesium fluoride (∼3%). There are two main structural types in the bone: cortical bone forms a dense outer shell and cancellous or trabecular bone forms the porous inner core. Cortical bone is highly dense ...
Fluoride contamination of groundwater, both anthropogenic and natural, is a major problem worldwide. In this study, fluoride removal by crushed limestone (99% …
Calcium bromide 125 132 143 213 278 295 312 Calcium carbonate (Aragonite) 7.753×10 −4: Calcium carbonate (Calcite) 6.17×10 −4: Calcium chlorate 209 Calcium chloride 59.5 64.7 74.5 100 128 137 147 154 159 Calcium chromate 4.5 2.25 1.83 1.49 0.83 Calcium citrate 0.085 Monocalcium phosphate 1.8 Calcium fluoride 0.008575 …
Purpose: To evaluate the effectiveness in reducing dentin hypersensitivity (DH) of a commercial toothpaste containing 8% arginine, calcium carbonate and fluoride when …
Solubility product constant ( Ksp) (or the solubility product) is the product of the molar concentrations of the constituent ions, each raised to the power of its stoichiometric coefficient in the equilibrium equation. For instance, if a compound A a B b is in equilibrium with its solution. A a B b (s) → a A + + b B.
Calcium fluoride is not recovered from the waste streams and it is not recycled due to the high water content and the low quality of the sludge. Crystallization process in a fluidized bed reactor (FBR) appears as an alternative technology to the conventional chemical precipitation process. ... Calcium Carbonate / chemistry
However, it is important to know that combining calcium phosphates with fluorides within a toothpaste formulation may reduce the bioavailability of (ionic) fluoride in the oral cavity. This is due to the reaction of fluoride with calcium forming insoluble compounds such as Calcium Fluoride, CaF 2, or Fluoroapatite, Ca 5 (PO 4) 3 F [31, 47, …
Calcium fluoride (CaF2) exists in nature as the mineral fluorite. Fluorite exhibits a strong radiation-induced TL and, after special treatment, can be used satisfactorily for radiation dosimetry purposes. The first reported use of the "radiothermoluminescence" of natural calcium fluoride occurred in 1903.
Calcium carbonate (calcite) CaCO 3: 3.36 x 10-9: Calcium carbonate (aragonite) CaCO 3: 6.0 x 10-9: Calcium fluoride: CaF 2: 3.45 x 10-11: Calcium hydroxide: Ca(OH) 2: 5.02 x 10-6: Calcium iodate: Ca(IO 3) 2: 6.47 x 10-6: Calcium iodate hexahydrate: Ca(IO 3) 2 x 6H 2 O: 7.10 x 10-7: Calcium molybdate: CaMoO: 1.46 x 10-8: Calcium oxalate monohydrate:
Calcium carbonate is another insoluble compound that is used as a dentifrice abrasive. ... Naylor MN. A four-year clinical study to determine the caries-inhibiting effect of calcium glycerophosphate and sodium fluoride in calcium carbonate base dentifrices containing sodium monofluorophosphate. Caries Res. 1983; 17:267–276.
For ionic compounds with limited solubility in water, an equilibrium constant, K sp, can be defined from the ion concentration in water from the equation:. M m A n (s) = mM n+ (aq) + nA m-(aq). where M m A n is the slightly soluble substance and M n+ and A m-are the ions produced in solution by dissosiation of M m A n.. K sp = [M n+] m * [A m-] n. The table …
The presence of halogens has an adverse effect on the zinc extraction process through electrowinning, the last phase of the RLE (Roasting, Leaching and Electrowinning) zinc extraction route. Fluoride (F−) may be present as calcium fluoride (CaF2) and this is, for example, the case in double leached Waelz oxide (DLWO). …
The anti-caries efficacy of calcium carbonate-based fluoride toothpastes - PubMed. Fluoride delivered from calcium carbonate-based SMFP toothpastes is an effective …
The other dentifrices contained calcium carbonate and they exhibited significantly (p < 0.001) lower bioavailable fluoride levels (27% to 61%), through the generation of poorly soluble fluoride phases. The saliva biomimetic CPP, as CPP-ACP, in a dentifrice stabilised calcium and fluoride ions to maintain fluoride's bioavailability.
6 Citations. Metrics. Abstract. Calcium added to dentifrices can complex with fluoride ions to reduce intra-oral bioavailability and therefore efficacy in preventing …
Chapter 26 Appendix B: Solubility-Product Constants ( Ksp) for Compounds at 25°C. Chapter 26. Appendix B: Solubility-Product Constants (. K. sp. ) for Compounds at 25°C. Source of data: CRC Handbook of Chemistry and Physics, 84th Edition (2004); sulfide data from Lange's Handbook of Chemistry, 15th Edition (1999).
Product Name Calcium fluoride No. : C89-250; C89-500 CAS No Synonyms Fluorspar; Fluorite; Calcium difluoride Recommended Use Laboratory chemicals. Uses advised against Food, drug, pesticide or biocidal product use. Details of the supplier of the safety data sheet Emergency Telephone Number CHEMTRECÒ, Inside the USA: 800 …
Yes, the calcium ion could lead to precipitation. The solubility of $ce{CaCO3}$ in distilled water is about 15 mg/L, which is about 0.15 mM calcium ion if there is no other source of carbonate. The solubility constant for $ce{CaF2}$ is about $4times 10^{-11}$, which means that we can only have 0.5 mM fluoride ions before …
First, we selected Ca (OH)2 and CaCO3 as a reactant among the various alkali salts which have a high removal efficiency and a competitive price by forming a calcium fluoride precipitate ...
At low pH more hydrogen fluoride is formed which promotes reabsorption by the renal tubules. Renal excretion is relatively rapid. The half-life of fluoride in bone is about 20 years. Toxic Mode(s) of Action. Fluoride combines with calcium in blood and tissues forming insoluble calcium fluoride. This results in acute hypocalcemia. Clinical Signs
Calcium carbonate nanoparticles fabricated by a facile method based on the colloidal gas aphrons for removal of fluoride ions from aqueous solutions. ... Ab initio calculations and reduced density gradient analyses of the structure and energetics of hydrated calcium fluoride and calcium carbonate. Physical Chemistry Chemical …
The other dentifrices contained calcium carbonate and they exhibited significantly (p < 0.001) lower bioavailable fluoride levels (27% to 61%), through the …