Chemical Changes and Surface Morphology of Acid-Etching of Human Enamel Treated with Topical Fluoride Agents in vitro

1987 ◽  
Vol 21 (6) ◽  
pp. 482-493 ◽  
Author(s):  
F.N. Hattab ◽  
S.H.Y. Wei
Keyword(s):  
Surface Morphology ◽  
Acid Etching ◽  
Chemical Changes ◽  
Human Enamel ◽  
Topical Fluoride

Evaluation of fissure sealant applied to topical fluoride treated teeth

2005 ◽  
Vol 29 (3) ◽  
pp. 215-219 ◽  
Author(s):  
Azza El-Housseiny ◽  
Aly Sharaf
Keyword(s):  
Test Group ◽  
Acid Etching ◽  
Control Group ◽  
Fissure Sealant ◽  
Fluoride Treatment ◽  
Permanent Molars ◽  
And Control ◽  
Topical Fluoride ◽  
Sealant Retention

Fissure sealant is an important tool in the prevention of dental caries. This study evaluated the effect of treating the enamel with topical fluoride gel prior to acid etching on sealant retention clinically (Part I) and in vitro (Part II). In part I a split mouth design using contralateral first permanent molars was conducted. Seventy (35 pairs) molars were sealed. Fissure sealant was applied on one side of the mouth (control group) and the contralateral tooth received acidulated phosphate fluoride gel (test group) prior to acid etching. The sealant was evaluated after 6 and 12 months and scored as intact, partially lost or completely missing. In part II, the shear bond strength between sealant and buccal enamel of extracted permanent molars without or with topical fluoride treatment was evaluated. Results showed no statistically significant differences between the test and control groups either clinically or in vitro. It is concluded that topical fluoride application prior to acid etching does not have a deleterious effect on sealant retention. However, further investigations should be conducted using different types of fluoride before altering the traditional practices.

scholarly journals Chemical Changes of Enamel Produced by Sodium Fluoride, Hydroxyapatite, Er:YAG Laser, and Combined Treatments

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Alma Yadira Ceballos-Jiménez ◽  
Laura Emma Rodríguez-Vilchis ◽  
Rosalía Contreras-Bulnes ◽  
Jesús Arenas Alatorre ◽  
Rogelio José Scougall-Vilchis ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Sodium Fluoride ◽  
Er:Yag Laser ◽  
Combined Treatment ◽  
Dental Enamel ◽  
Chemical Changes ◽  
Treatment Groups ◽  
Human Enamel ◽  
Occlusal Surfaces

Occlusal pits and fissures of permanent molars are considered to have higher risk of developing caries. Enamel demineralization can be prevented by applying remineralizing agents, and their absorption increases with prior irradiation. This work evaluates the chemical changes produced by treating occlusal surfaces with sodium fluoride (NaF), hydroxyapatite-NaF-xylitol (HA-NaF-X), Er:YAG laser irradiation (L), and combinations thereof. Fifty enamel samples were randomly assigned to five groups (n=10): NaF, HA-NaF-X, L, L + NaF, and L + HA-NaF-X. The chemical composition of human enamel was evaluated before (BT) and after (AT) treatment using energy-dispersive X-ray spectroscopy (EDS) and expressed in atomic percentages (at%). For combined treatment groups, the products were applied after laser irradiation. The statistical analyses included a pairedt-test and ANOVA (p≤0.05). After treatment, a significant increase in F at% was observed in the NaF group (2.71 ± 1.41). The irradiated groups showed significant increases in Ca and P at% and the Ca/P ratio. The highest values occurred for L + NaF (30.44 ± 4.28 Ca at%, 11.97 ± 1.45 P at%, and 2.55 ± 0.22 Ca/P ratio). Er:YAG laser irradiation alone or in combined protocols increased the Ca and P content of dental enamel, in vitro.

The Effect of Topical Fluoride Applications on the Surface Free Energy of Human Enamel- An in vitro Study

1984 ◽  
Vol 63 (5) ◽  
pp. 635-641 ◽  
Author(s):  
H.P. De Jong ◽  
A.W.J. Van Pelt ◽  
H.J. Busscher ◽  
J. Arends
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
In Vitro Study ◽  
Vitro Study ◽  
Human Enamel ◽  
Topical Fluoride

scholarly journals In vitro analysis of femtosecond laser as an alternative to acid etching for achieving suitable bond strength of brackets to human enamel

2013 ◽  
Vol 29 (3) ◽  
pp. 897-905 ◽  
Author(s):  
M. C. Lorenzo ◽  
M. Portillo ◽  
P. Moreno ◽  
J. Montero ◽  
R. Castillo-Oyagüe ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Bond Strength ◽  
Acid Etching ◽  
Human Enamel ◽  
Vitro Analysis ◽  
In Vitro Analysis

In vitro Fluoride Uptake, Distribution and Retention by Human Enamel After 1- and 24-Hour Application of Various Topical Fluoride Agents

1980 ◽  
Vol 59 (3) ◽  
pp. 573-582 ◽  
Author(s):  
D.H. Retief ◽  
P.G. Sorvas ◽  
E.L. Bradley ◽  
R.E. Taylor ◽  
A.R. Walker
Keyword(s):  
Fluoride Uptake ◽  
Human Enamel ◽  
Topical Fluoride

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).

EFFECT OF HUMAN ENAMEL ON WEAR OF THREE TYPES OF INTERIM RESTORATIVE MATERIALS (AN IN-VITRO STUDY)

2017 ◽  
Vol 63 (4) ◽  
pp. 3933-3945
Author(s):  
Khaled Haggag ◽  
Muhammad Abbas ◽  
Zainab EL Sharkawy
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Human Enamel ◽  
Restorative Materials
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