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The combined application of topical fluoride and fissure sealant--results after 2 years.

The effectiveness of combining the application of topical stannous fluoride and fissure sealing using Nuva Seal was tested in a group of school children over a 2-year period. The retention rate of the applied sealant was 71.1%. The caries reduction after 2 years was 76.8% which appears to be slightly better than comparable studies using the sealant alone. Staining of the fissures, which may indicate an uptake of the applied fluoride by the tooth was also observed. Whilst the combined approach theoretically should provide additional protection from dental caries following the loss of the applied sealant, further observations are necessary to substantiate the hypothesis.

Acrylates↗

[Self-applied topical fluoride products for children available in Israel. Part two: Mouthwashes].

The use of self applied topical fluoride products is considered, today, the most effective caries prevention measure. The daily or weekly/biweekly use of fluoridated mouth rinses, containing adequate concentrations of fluoride ion, has been shown to be an important adjunct in caries prevention and arrest. The purpose of this paper was 1. to review the various types of fluoridated mouth rinses, with regard to the type of fluoride compound and its effectiveness; 2. to focus on the fluoridated mouthrinses available for children in Israel in regard to concentration and additives, and 3. to give recommendations for rational and safe use. The mouthrinses are presented according to their concentration, showing Fluoride compound, additives, alcohol presence, flavor and manufacturer. The issues of safety in regard to ingestion of the rinse by small children are discussed. Rinses of no less than a 230-250 ppm are recommended to children of medium and high caries risk above the age of 6. The product should carry clear information regarding the type of fluoride compound, its concentration, instructions for use and age restriction. The products should be further protected by child proof caps.

Age Factors↗

[Examination of the effect of topical fluoride treatment on the enamel surface in the S.E.M].

The study was undertaken to determine the effect of topical fluoride treatment on the enamel surface in the direct bonding system. In this in vitro study, the enamel surfaces of the sample teeth that were subjected to the acidic phosphate fluoride treatment, the basic phosphate fluoride treatment and the only orthophosphoric acid treatment were examined in the S.E.M. Scanning electron photomicrographs were taken at magnifications x2000 and x5000. The overall etching effect on the enamel surface treated with the basic phosphate fluoride solution was very similar to sample surface etched with orthophosphoric acid. It was concluded that there wasn't any differences about mechanical retention specialty at surface characteristics.

Acid Etching, Dental↗

Studies of fluoride retention by oral soft tissues after the application of home-use topical fluorides.

Previous studies have focused on enamel and plaque as the primary sites of fluoride (F) retention in the mouth. The present study was undertaken to evaluate the role of oral soft tissue as a site of F retention by comparing an edentulous subject panel (n = 9) with a fully dentate panel (n = 10). Unstimulated whole saliva samples were collected by having subjects pool saliva for two min. Samples were collected over a 24-hour period after application of a placebo dentifrice (PD; 0.4 ppm F), fluoride dentifrice (FD; 1100 ppm F), fluoride rinse (FR; 226 ppm F), or fluoride gel (FG; 5000 ppm F) delivered in custom trays. There was no statistically significant difference in salivary flow rate between the two panels for any of the treatments. The edentulous panel had higher salivary F levels than the dentate panel, which reached statistical significance (p less than 0.05) for the FD and FG treatments. In a separate study involving the same treatments, F levels at specific soft-tissue sites were measured over a one-hour period by use of absorbent discs placed in different soft-tissue areas of the mouth. The tongue and lower posterior vestibule retained the highest F levels, followed by the upper posterior buccal vestibule and upper anterior labial vestibule, with the lowest F levels retained in the lower anterior vestibule and the floor of the mouth. There was a strong-to-moderate correlation between whole saliva F concentration and F levels at specific soft-tissue sites. This study establishes the importance of oral soft tissue as the major site of F retention in the mouth.

Analysis of Variance↗

[The role of topical fluorides in the prevention of dental caries].

Employment of fluorides means the employment of methods and processes which aim at increasing the fluoride concentration of the tooth surface. Methods requiring cooperation of experts (dentist, mouth hygienist) mean application of fluoride compounds of higher concentration at given periods (3 to 6 months). Methods not requiring professional cooperation prefer frequent (daily) employment of products of low concentration (toothpastes, mouthwashes etc.). In countries where such fluoride containing oral hygiene products are used extensively and systematically, frequency of caries significantly decreases. By topically employed fluorides the beneficial effect of the systemic fluoride use, (drinking water, salt, tablets) is increased.

Adolescent↗

The effect of oral topical fluorides on the surface of commercially pure titanium.

This study investigated the risk of corrosion of titanium abutments by the accidental or unauthorized use of preventive fluorides in the mouth. Polished test pieces of commercially pure ASTM grade 1 titanium were immersed in topically used fluorides (toothpaste, gel, and varnish). They were brushed in vitro with toothpaste and gel, corresponding to the time and effect of brushing with toothpaste twice a day for 6 years and with gel once a week for 12 years. Results indicate that an aminofluoride toothpaste with low ionizable fluoride content (0.125%) used in brushing natural teeth does not cause deterioration of the titanium abutments in the same mouth if the titanium is grade 1 purity. Carefully controlled use of fluoride gel (F 1.25%) and varnish (F 2.25%) is likewise not dangerous. The mechanical abrasion caused by toothbrush bristles appears to be the main deteriorating factor for the titanium surface.

Corrosion↗

In vitro fluoride uptake, distribution and retention by human enamel after 1- and 24-hour application of various topical fluoride agents.

The in vitro fluoride acquisition by human enamel after a 1-hour and 24-hour application of APF, Duraphat (a resin varnish) or Fluor Protector (a polyurethane varnish) and subjection to various procedures was determined. Fluoride acquisition was the greatest in teeth treated with Fluor Protector and the least in APF-treated teeth. Fluoride uptake and distribution were increased by prolonging the contact time between the varnishes and enamel, and fluoride retention was decreased after subsequent exposure to synthetic saliva.

Acidulated Phosphate Fluoride↗

Topical fluorides.

Fluoride is currently conceived as acting for the most part topically, reducing dissolution and enhancing remineralization of the enamel. The introduction of small amounts of fluoride into the mouth as often as possible is therefore important. Regular use of fluoride toothpastes is the most practicable way of maintaining elevated fluoride concentrations at the plaque-enamel interface. The importance of fluoride toothpastes as the basic caries preventive method requires emphasizing. For those who need additional fluoride therapy, frequent rinsing with dilute fluoride solutions or topical applications of concentrated fluoride solutions, gels or varnishes are the commonest alternatives. None of these methods is superior to any other. Thus, choice of method depends on costs, convenience, patient acceptance and safety.

Bacteria↗

In vitro effect of topical fluorides on sealant materials.

The purpose of this study was to determine by visual inspection and by scanning electron microscopy (SEM) whether commercially available, topical, acidulated phosphate fluoride (APF) and neutral sodium fluoride (NaF) agents cause surface roughening of five sealant materials: two unfilled resins, two filled resins, and one glass-ionomer material. In addition, the effect of treatment with 1.23% APF and sonification on weight of an unfilled and a filled sealant was compared to treatment with controls. Unfilled sealants exhibited no surface changes visually or on micrographs following any treatment. Filled sealants and the glass-ionomer sealant exhibited visually apparent changes depending on the treatment. SEM inspection of filled sealants with visually apparent changes showed loss of filler particles whereas the glass-ionomer sealant exhibited apparent destruction both of the matrix and the filler particle. No significant differences in weight were found between sonicated and unsonicated specimens. However, significant loss of weight was found with filled sealant specimens, but not unfilled sealant specimens, treated with 1.23% APF gel as compared with the specimens treated with water. The results of this in vitro study indicate that preventive therapies that combine use of topical fluorides and sealants may cause deterioration of filled sealants and glass-ionomer sealant material, but not unfilled sealants.

Acidulated Phosphate Fluoride↗