Evaluation of the Effects of a Pyrophosphate-Fluoride Anticalculus Dentifrice on Remineralization and Fluoride Uptake in situ

1991 ◽  
Vol 25 (1) ◽  
pp. 65-69 ◽  
Author(s):  
J.R. Mellberg ◽  
I.D. Petrou ◽  
R. Fletcher ◽  
N. Grote
Keyword(s):  
Fluoride Uptake

scholarly journals In situ effect of a dentifrice with low fluoride concentration and low pH on enamel remineralization and fluoride uptake

2007 ◽  
Vol 49 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Marinês Nobre-dos-Santos ◽  
Lidiany K. A. Rodrigues ◽  
Altair A. Del-Bel-Cury ◽  
Jaime A. Cury
Keyword(s):  
Fluoride Concentration ◽  
Low Ph ◽  
Fluoride Uptake

scholarly journals Effect of APF gel application time on enamel demineralization and fluoride uptake in situ

2009 ◽  
Vol 20 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Rita Sarmiento Villena ◽  
Livia Maria Andaló Tenuta ◽  
Jaime Aparecido Cury
Keyword(s):  
Dental Plaque ◽  
Sucrose Solution ◽  
Blind Study ◽  
Application Time ◽  
Treatment Groups ◽  
Fluoride Uptake ◽  
Time Of Application ◽  
Enamel Demineralization

This in situ crossover and blind study was conducted to investigate the effect of professional acidulated phosphate fluoride (APF) gel application time on the subsequent inhibition of enamel demineralization. During 3 phases of 28 days each, 15 volunteers wore palatal appliances containing 4 enamel blocks, which were subjected to 3 treatment groups: not treated (control) and pre-treated with APF gel for 1 or 4 min. Dental plaque was allowed to accumulate on the blocks and the appliances were immersed in 10% sucrose solution 3 times a day simulating a cariogenic challenge. After each phase, the blocks were removed to evaluate enamel demineralization and concentration of fluoride (F) remaining after the cariogenic challenge. F formed on enamel was determined in additional enamel blocks subjected only to APF gel application. APF gel was efficient in reducing enamel demineralization (p<0.05), irrespective of the application time (p>0.05). Also, the concentration of the F formed and retained on enamel was significantly higher after APF gel application (p<0.05), but the effect of time of application was not statistically significant (p>0.05). The results suggest that APF application for either 1 or 4 min is equally efficient to increase F concentration in enamel and reduce enamel demineralization.

Tin and fluoride uptake in human enamel in situ: electron probe and chemical microanalysis

1966 ◽  
Vol 73 (6) ◽  
pp. 1301-1305 ◽  
Author(s):  
Kirk C. Hoerman ◽  
James E. Klima ◽  
L.S. Birks ◽  
David J. Nagel ◽  
William E. Ludwick ◽  
...  
Keyword(s):  
Electron Probe ◽  
Fluoride Uptake ◽  
Human Enamel

In situ Fluoride Uptake from Fluoride Dentifrices by Carious Enamel

1985 ◽  
Vol 64 (6) ◽  
pp. 900-903 ◽  
Author(s):  
G.K. Stookey ◽  
B.R. Schemehorn ◽  
B.L. Cheetham ◽  
G.D. Wood ◽  
G.V. Walton
Keyword(s):  
Fluoride Uptake

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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