A comparative assessment of fluoride concentration available in saliva using daily prescribed topical fluoride agents

This study compared the effect of topically applied fluoride products on dentine lesions in an in vitro experiment. Demineralized bovine dentine specimens were treated once with either SDF solution (35,400 ppm F), NaF varnish (22,600 ppm F), TiF4 solution (9,200 ppm F), SnF2 gel (1,000 ppm F), no treatment (control) or preserved as baseline lesions. After the application and subsequent removal of the fluoride products, the specimens were subjected to pH-cycling. Calcium loss and uptake in the de- and remineralization buffers were assessed daily. Fluoride release into the buffers was analyzed on day 1, 2, 3, 5, 8 and 13. After the pH-cycling period, mineral distribution throughout the lesion depth was analyzed using transversal microradiography (TMR). X-ray energy-dispersive spectroscopy (EDS) examined the deposition of silver, titanium and tin after application of SDF, TiF4, and SnF2, respectively. Overall, calcium loss and uptake analysis in the de- and remineralization buffers revealed that the SDF product was the most effective in inhibiting lesion progression, followed by the TiF4, NaF, and SnF2 products. Fluoride analysis disclosed a steep reduction of the amount of fluoride released into de- and remineralization buffers with time. The fluoride effects on de- and remineralization continued beyond the days that fluoride was released into the buffers. TMR analysis showed significant remineralization in the outer zone of the dentine lesions for all fluoride products, with SDF giving hyper-mineralization in this zone. In the inner zone, lesions developed in all fluoride groups, with the smallest in the SDF group. EDS showed silver and titanium deposition in depth up to 85 μm and 8 μm, respectively, while no tin deposition was observed. The silver in the dentine lesions did not contribute significantly to the density of the TMR profiles in the SDF group. In conclusion, all topical fluoride products protected the dentine lesions against lesion progression, but at different degrees. SDF showed a superior effect in protection against further demineralization and enhancement of remineralization. This was probably attributed to its fluoride concentration that was the highest among the fluoride products.

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Nano-mechanical Properties of Fluoride-treated Enamel Surfaces

Journal of Dental Research ◽

10.1177/154405910808700414 ◽

2008 ◽

Vol 87 (4) ◽

pp. 381-385 ◽

Cited By ~ 22

Author(s):

Y.-R. Jeng ◽

T.-T. Lin ◽

T.-Y. Wong ◽

H.-J. Chang ◽

D.-B. Shieh

Keyword(s):

Mechanical Properties ◽

Calcium Fluoride ◽

Fluoride Concentration ◽

Wear Depth ◽

Fluoride Treatment ◽

Force Microscopy ◽

Early Loss ◽

Atomic Force ◽

Topical Fluoride

Calcium-fluoride-like deposits play a key role in caries prevention by topical fluoride. Previous microhardness analyses have introduced errors due to a substrate effect, and thereby could not substantiate the early loss of these deposits. To address this question, we applied Atomic Force Microscopy (AFM) and a nano-indentation technique in this study to characterize the nano-mechanical properties and topographic structure of enamel surfaces following topical fluoride treatment. The deposits were found to have a low nano-hardness and a high nano-wear depth, which explains the early loss of calcium-fluoride-like deposits. However, a 22% increase in the fluoride concentration could still be detected on the treated enamel surface following the removal of the surface deposits, justifying the long-term effectiveness of topical fluoride treatment.

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Stannous fluoride treatment of acid-etched caries-like lesions of enamel: A scanning electron microscopic study

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100113482 ◽

1984 ◽

Vol 42 ◽

pp. 720-721

Author(s):

M. John Hicks ◽

Leon M. Silverstone ◽

David G. Gantt ◽

Catherine M. Flaitz

Keyword(s):

Acid Etching ◽

Surface Zone ◽

Electron Microscopic ◽

Fluoride Treatment ◽

Stannous Fluoride ◽

Scanning Electron Microscopic Study ◽

Demineralized Enamel ◽

Intact Surface ◽

Topical Fluoride

Although fluoride levels become elevated in sound enamel following a topical fluoride treatment, the caries-preventive effect of fluoride is thought to be due primarily to the role of fluoride in remineralization of clinically undetectable enamel lesions and hypomineralized enamel. During lesion formation, redistribution of fluoride from the enamel surface to the subsurface demineralized enamel occurs. This results in a surface zone with a relatively low fluoride content. In order to maintain an intact surface zone over a carious lesion, it may be necessary to replenish the fluoride levels with an exogenous fluoride source. By acid-etching the lesion surface, a more reactive surface is made available for fluoride interaction. In addition, porosities and etching patterns may be created, allowing for bonding of a caries-resistant resin material to the lesion surface. The purpose of this study was to determine the integrity of the caries-like lesion surface following acid-etching and subsequent stannous fluoride treatment (SnF2).

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Skill decay: A comparative assessment of training protocols and individual differences in the loss and reacquisition of complex skills

PsycEXTRA Dataset ◽

10.1037/e430042005-001 ◽

2002 ◽

Cited By ~ 2

Author(s):

Winfred Arthur ◽

Winston Bennett ◽

Eric A. Day ◽

Theresa L. McNelly

Keyword(s):

Individual Differences ◽

Comparative Assessment ◽

Complex Skills ◽

Training Protocols

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Comparative assessment of polyphenolic content and antioxidant capacity of Arnica montana samples differentiated on organ types from wild populations in the Romanian Eastern Carpathians

Planta Medica ◽

10.1055/s-0035-1565813 ◽

2015 ◽

Vol 81 (16) ◽

Author(s):

CP Stefanache ◽

T Adriana ◽

D Doina ◽

M Anca

Keyword(s):

Antioxidant Capacity ◽

Comparative Assessment ◽

Wild Populations ◽

Arnica Montana ◽

Eastern Carpathians ◽

Polyphenolic Content

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Development of biotechnology for gluten-free sourdough bakery products with a new microbial composition

Khleboproducty ◽

10.32462/0235-2508-2020-29-12-59-63 ◽

2020 ◽

Vol 29 (12) ◽

pp. 59-63

Author(s):

O.I. Parakhina ◽

◽

M.N. Lokachuk ◽

L.I. Kuznetsova ◽

E.N. Pavlovskaya ◽

...

Keyword(s):

Lactic Acid ◽

Lactic Acid Bacteria ◽

Starter Culture ◽

Comparative Assessment ◽

Starter Cultures ◽

Bakery Products ◽

Gluten Free ◽

Microbial Composition ◽

Fermentative Activity ◽

Theoretical Foundations

The research was carried out within the framework of the theme of state assignment № 0593–2019–0008 «To develop theoretical foundations for creating composite mixtures for bakery products using physical methods of exposure that ensure homogeneity, stability of mixtures and bioavailability of nutrients, to optimize diets population of Russia». The data on the species belonging of new strains of lactic acid bacteria and yeast isolated from samples of good quality gluten-free starter cultures are presented. A comparative assessment of the antagonistic and acid-forming activity of strains of lactic acid bacteria and the fermentative activity of yeast was carried out. The composition of microbial compositions from selected strains of LAB and yeast was developed. The influence of the starter culture on the new microbial composition on the physicochemical, organoleptic indicators of the bread quality and resistance to mold and ropy-disease was investigated.

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