Experiments on the initiation of calcium fluoride formation with reference to the solubility of dental enamel and brushite

Larsen, Mona; Jensen, Stig Jorgo

doi:10.1016/0003-9969(94)90030-2

Cited by 34 publications

(24 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In studies of the reaction of fluoride ion with enamel, it has been confirmed that CaF 2 -like globular crystals are formed on the enamel surface at 300 ppm fluoride concentration under the neutral pH condition and at 100 ppm under the weak acidic condition (pH 5.0) 3,9,12,13) . Based on this fact, it is considered that CaF 2 is hardly formed in the 100 ppmF group under the neutral pH conditions and that CaF 2 formation may be possible in the 300 to 500 ppm groups under such conditions.…”

Section: Caf 2 Formation By Enamel Pulus Fluoride Solution and Fluormentioning

confidence: 96%

Estimation of Optimal Amount of Fluoride Dentifrice For Adults to Prevent Caries by Comparison between Fluoride Uptake into Enamel In Vitro and Fluroide Concentration in Oral Fluid In Vivo

Koga

Yamagishi

Takayanagi

et al. 2007

Bull. Tokyo Dent. Coll.

View full text Add to dashboard Cite

Fluoride dentifrice has been accepted widely for use in caries prevention and its effectiveness has been confirmed. In order to enable the use of fluoride dentifrice effectively in daily brushing, the present study was performed to examine the relationship between fluoride uptake and the amount of fluoride dentifrice used and brushing time for adults. We examined the relationship between fluoride uptake into the surface layer (4-6m)of enamel and the active fluoride concentration in vitro and the relationship between the amount of fluoride dentifrice (1,000ppmF) used and the fluoride concentration in oral fluid in vivo. It became clear that fluoride uptake into the enamel was increased at the concentrations of 300ppmF or more. Fluoride uptake at 300ppmF was increased for 2min and became saturated thereafter. The results of the relationship between the fluoride concentration in the oral fluid and the amount of fluoride dentifrice used indicated that the amount of dentifrice that could maintain the mean fluoride concentration at 300ppm or more for 2min was 1.0g or more. From these results, the recommended amount of fluoride dentifrice (1,000ppmF) is 1.0g or more for adults.

show abstract

Section: Caf 2 Formation By Enamel Pulus Fluoride Solution and Fluormentioning

confidence: 96%

Estimation of Optimal Amount of Fluoride Dentifrice For Adults to Prevent Caries by Comparison between Fluoride Uptake into Enamel In Vitro and Fluroide Concentration in Oral Fluid In Vivo

Koga

Yamagishi

Takayanagi

et al. 2007

Bull. Tokyo Dent. Coll.

View full text Add to dashboard Cite

show abstract

“…Larsen and Jensen [1994] pointed out that CaF 2 formation is due to a twostage reaction as suggested by Gerould [1945]: calcium is released from the dental tissue and then reacts with fluoride from the topical agent. Hence the formation of CaF 2 depends on the solubility of the tooth and the fluoride concentration.…”

Section: Calcium Fluoride Formationmentioning

confidence: 99%

CaF<sub>2</sub> Formation: Cariostatic Properties and Factors of Enhancing the Effect

Øgaard¹

2001

Caries Res

109

View full text Add to dashboard Cite

CaF₂ or a CaF₂-like material/phosphate-contaminated CaF₂ is a major reaction product during topical treatment of dental hard tissues. Recently, evidence has suggested that CaF₂ is formed not only on surfaces but also to some extent in the enamel. The minimum concentration of fluoride required for CaF₂ formation is not well known and may depend on whether calcium is available from plaque fluid or only through dissolution of the dental hard tissue. Furthermore, surface adsorption of fluoride to crystals may cause local concentrations necessary for CaF₂ formation. It has been suggested that CaF₂ acts as a pH-controlled reservoir of fluoride. The rate-controlling factor appears to be phosphate, which controls the dissolution rate of CaF₂ at high pH. Increasing fluoride concentration, prolonging the exposure time or using a fluoride solution with low pH can increase CaF₂ formation. CaF₂ formed at low pH contains less internal phosphate which has been shown to be less soluble. This may be of clinical significance for fluoride applied topically a few times per year.

show abstract

“…5b shows the EDS spectrum of the precipitated salts. In vitro studies indicate that fluoride concentrations of 300 ppm (at pH 7) or 100 ppm (at pH 5) are critical to induce a spontaneous precipitation of calcium fluoride [49]. The 227 ppm F -solution used in this study, with a pH between 5.3 and 5.7, might have caused an almost spontaneous precipitation of calcium fluoride.…”

Section: Fluoride Influence On Titanium Tribocorrosionmentioning

confidence: 93%

Combined Influence of Fluoride and Biofilms on the Biotribocorrosion Behavior of Titanium Used for Dental Applications

et al. 2015

View full text Add to dashboard Cite

Dental implant failures occur mainly due to biofilm infections and mastication micro-movements or load stresses that may induce wear degradation. Dental implants' microgaps are highly susceptible areas for biofilm formation and fluoride retention. Although fluoride is an antimicrobial agent widely used in caries prevention, its influence on biofilms under sliding wear remains unknown. The main aim of this work was to assess the effect of mixed biofilms and fluoride on the tribocorrosion behavior of titanium. Streptococcus mutans and Candida albicans mixed biofilms were cultured for 8 days on ground and polished commercially pure titanium. Biofilms' formation was influenced by topography: higher roughness surfaces presented higher levels of biomass. Reciprocating sliding tests were performed on both surfaces, with and without biofilms, immersed in artificial saliva in the absence or presence of fluoride (30 and 227 ppm F -). The low friction coefficient registered indicated the lubricating effect of biofilms on titanium surfaces. Fluoride was also found to have lubricating properties on titanium during sliding, probably due to the precipitation of calcium fluoride (or like) salts. The presence of fluoride influenced the biotribological behavior of titanium surfaces covered with biofilms, facilitating their structural disruption and detachment. Nevertheless, open circuit potential tests reduced the corrosion of titanium in the presence of fluoride (227 ppm F -) and biofilms. In conclusion, it is highlighted that fluoride interaction with biofilms can significantly influence the tribological properties of commercially pure titanium in the oral cavity.

show abstract

Experiments on the initiation of calcium fluoride formation with reference to the solubility of dental enamel and brushite

Cited by 34 publications

References 21 publications

Estimation of Optimal Amount of Fluoride Dentifrice For Adults to Prevent Caries by Comparison between Fluoride Uptake into Enamel In Vitro and Fluroide Concentration in Oral Fluid In Vivo

Estimation of Optimal Amount of Fluoride Dentifrice For Adults to Prevent Caries by Comparison between Fluoride Uptake into Enamel In Vitro and Fluroide Concentration in Oral Fluid In Vivo

CaF<sub>2</sub> Formation: Cariostatic Properties and Factors of Enhancing the Effect

Combined Influence of Fluoride and Biofilms on the Biotribocorrosion Behavior of Titanium Used for Dental Applications

Contact Info

Product

Resources

About