Fluoride treatment of AlPO4-Al2O3 catalysts. II. Poisoning experiments by bases for cyclohexene conversion and cumene cracking

1994 ◽  
Vol 24 (3-4) ◽  
pp. 293-301 ◽  
Author(s):  
F. M. Bautista ◽  
J. M. Campelo ◽  
A. Garcia ◽  
D. Luna ◽  
J. M. Marinas ◽  
...  
Keyword(s):  
Cumene Cracking ◽  
Fluoride Treatment ◽  
Cyclohexene Conversion

SEM Evaluation of Fluoride Pretreatment Effects on Acid-Etching of Caries-Like Enamel Lesions In Vitro

1981 ◽  
Vol 39 ◽  
pp. 474-475
Author(s):  
M. John Hicks
Keyword(s):  
Dental Enamel ◽  
Preventive Measure ◽  
Acid Etching ◽  
Distilled Water ◽  
Adhesive Resin ◽  
Fluoride Treatment ◽  
Treatment Groups ◽  
Pretreatment Effects ◽  
Preparation Techniques

Acid-etching of enamel surfaces has been performed routinely to bond adhesive resin materials to sound dental enamel as a caries-preventive measure. The effect of fluoride pretreatment on acid-etching of enamel has been reported to produce inconsistent and unsatisfactory etching patterns. The failure to obtain an adequate etch has been postulated to be due to fluoride precipitation products deposited on the enamel surface. The purpose of this study was to evaluate the effects of fluoride pretreatment on acid-etching of carieslike lesions of human dental enamel.Caries-like lesions of enamel were created in vitro on human molar and premolar teeth. The teeth were divided into two fluoride treatment groups. The specimens were exposed for 4 minutes to either a 2% Sodium Fluoride (NaF) solution or a 10% Stannous Fluoride (SnF2) solution. The specimens were then washed in deionized-distilled water. Each tooth was sectioned into four test regions. This was carried out to compare the effects of various time exposures (0 to 2 minutes) and differing concentrations (10 to 60% w/w) of phosphoric acid (H3PO4) on etching of caries-like lesions. Standard preparation techniques for SEM were performed on the specimens.

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

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).

In vitro Evaluation of Enamel Surface Treated with Fluoride After Bleaching and Etching Erosive Processes

2018 ◽  
Vol 69 (7) ◽  
pp. 1714-1717
Author(s):  
Roxana Ionela Vasluianu ◽  
Norina Consuela Forna ◽  
Elena Raluca Baciu ◽  
Mirela Zaltariov ◽  
Lavinia Vasiliu ◽  
...  
Keyword(s):  
Enamel Surface ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Fluoride Treatment ◽  
Enamel Structure ◽  
Erosion Effect ◽  
Enamel Composition ◽  
Morphology Changes ◽  
Scanning Electron

The anti-erosion effect of fluoride on the enamel surface was investigated by ATR-FTIR, SEM and EDX techniques. Four extracted teeth (two incisors and two premolars) were initially bleached with carabamide peroxide and etched with ortho-phosphoric acid then fluoride treatment was applied. Significant differences in enamel composition and morphology were observed providing the effect of fluoride application in remineralization of teeth. Infrared spectroscopy was employed to probe the changes in enamel structure. Scanning electron microscopy/energy dispersive X-ray spectroscopy analysis revealed higher content in F of teeth enamel. Morphology changes revealed a re-mineralization of enamel surface after the treatment with fluoride gel.

Casein phosphopeptide–amorphous calcium phosphate fluoride treatment enriches the symbiotic dental plaque microbiome in children

2021 ◽  
Vol 106 ◽  
pp. 103582
Author(s):  
Armelia Sari Widyarman ◽  
Nadeeka S. Udawatte ◽  
Citra Fragrantia Theodorea ◽  
Anie Apriani ◽  
Mario Richi ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Dental Plaque ◽  
Fluoride Treatment ◽  
Casein Phosphopeptide

Effect of the Structure and Acidity of Micro-Mesoporous Alumosilicates on Their Catalytic Activity in Cumene Cracking

2016 ◽  
Vol 52 (4) ◽  
pp. 212-220 ◽  
Author(s):  
R. Yu. Barakov ◽  
N. D. Shcherban ◽  
P. S. Yaremov ◽  
Yu. G. Voloshyna ◽  
M. M. Krylova ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cumene Cracking

scholarly journals Erratum to Fluoride Treatment Increased Serum IGF-1 Bone Turnover, and Bone Mass, But Not Bone Strength, in Rabbits

1997 ◽  
Vol 61 (4) ◽  
pp. 349-349 ◽  
Author(s):  
C. H. Turner ◽  
L. P. Garetto ◽  
A. J. Dunipace ◽  
W. Zhang ◽  
M. E. Wilson ◽  
...  
Keyword(s):  
Bone Mass ◽  
Bone Turnover ◽  
Bone Strength ◽  
Fluoride Treatment
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