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      Impact of customary fluoride rinsing solutions on the pellicle’s protective properties and bioadhesion in situ

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          Abstract

          This study investigated the impact of customary fluoride based mouthrinses on the ultrastructure and the functional properties of the in situ pellicle, considering the prevention of erosion (8 volunteers) and initial biofilm formation (12 volunteers). Bovine enamel slabs were carried intraorally. After 1 min of pellicle formation, the subjects rinsed with elmex Kariesschutz (A), Dontodent Med Care (B), meridol (C) or elmex Zahnschmelzschutz Professional (D) for 1 min. In situ pellicle formation was continued up to 30 min/8 h before processing the slabs in vitro. Erosion was simulated by incubating the specimens in HCl (pH 3.0, 2.3, 2.0) for 120 s, measuring the kinetics of calcium/phosphate release photometrically; representative samples were evaluated by TEM and EDX. Bacterial adhesion was visualized fluorescence microscopically (DAPI/BacLight). Native enamel slabs or physiological pellicle samples served as controls. All investigated mouthrinses enhanced the erosion preventive pellicle effect in dependence of the pH-value. A significant decrease of Ca/P release at all pH values was achieved after rinsing with D; TEM/EDX confirmed ultrastructural pellicle modifications. All mouthrinses tendentially reduced bacterial adherence, however not significantly. The mouthrinse containing NaF/AmF/SnCl 2 (D) offers an effective oral hygiene supplement to prevent caries and erosion.

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          Cochrane reviews of randomized trials of fluoride therapies for preventing dental caries.

          N V Marinho (2009)
          To present the evidence summarized in the Cochrane fluoride reviews. An overview of the results of selected systematic reviews. Relevant systematic reviews published in the Cochrane Database of Systematic Reviews (CDSR) were identified by searching 'The Cochrane Library issue 4, 2008', using the terms 'Fluoride' and 'Caries'. Complete Cochrane reviews assessing the effectiveness of any fluoride-based intervention for preventing caries were selected, and their main features and findings were reviewed. 14 papers were identified of which 11 were relevant full-text reviews. The results were assessed of 7 reviews published from 2002 to 2004 concerning the relative effectiveness of 4 topical fluoride treatments (toothpastes, gels, varnishes and mouthrinses) in preventing caries in children and adolescents. Comparisons in these reviews were made against non-fluoride controls, against each other, and against different combinations. Findings from 4 reviews published between 2004 and 2006, assessing other fluoride modalities (slow release devices, milk), specific comparison/site (fluoride varnishes versus sealants in occlusal surfaces), and particular population and caries outcome (fluorides for white spot lesions in orthodontic patients) were also assessed. The 7 reviews confirm a clear and similar effectiveness of topical fluoride toothpastes, mouthrinses, gels and varnishes for preventing caries, and show that additional caries reduction can be expected when another topical fluoride is combined with fluoride toothpaste. Evidence is insufficient to confirm the effectiveness of slow release fluoride devices and fluoridated milk. The comparative effectiveness of other modes of delivering fluoride, such as to orthodontic patients is also as yet unclear. Fissure sealants appear more effective than fluoride varnish for preventing occlusal caries but the size of the difference is unclear. The benefits of topical fluorides are firmly established based on a sizeable body of evidence from randomized controlled trials. The size of the reductions in caries increment in both the permanent and the primary dentitions emphasizes the importance of including topical fluoride delivered through toothpastes, rinses, gels or varnishes in any caries preventive program. However, trials to discern potential adverse effects are required, and data on acceptability. Better quality research is needed to reach clearer conclusions on the effects of slow release fluoride devices, milk fluoridation, sealants in comparison with fluoride varnishes, and of different modes of delivering fluoride to orthodontic patients.
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            Fluoride mouthrinses for preventing dental caries in children and adolescents.

            Valeria CC Marinho, Lee Yee Chong, Helen Worthington … (2016)
            Fluoride mouthrinses have been used extensively as a caries-preventive intervention in school-based programmes and by individuals at home. This is an update of the Cochrane review of fluoride mouthrinses for preventing dental caries in children and adolescents that was first published in 2003.
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              Erosive tooth wear: a multifactorial condition of growing concern and increasing knowledge.

              Adrian Lussi, Thiago S Carvalho (2014)
              Dental erosion is often described solely as a surface phenomenon, unlike caries where it has been established that the destructive effects involve both the surface and the subsurface region. However, besides removal of the surface, erosion shows dissolution of mineral within the softened layer - beneath the surface. In order to distinguish this process from the carious process it is now called 'near surface demineralization'. Erosion occurs in low pH, but there is no fixed critical pH value concerning dental erosion. The critical pH value for enamel concerning caries (pH 5.5-5.7) has to be calculated from calcium and phosphate concentrations of plaque fluid. In the context of dental erosion, the critical pH value is calculated from the calcium and phosphate concentrations in the erosive solution itself. Thus, critical pH for enamel with regard to erosion will vary according to the erosive solution. Erosive tooth wear is becoming increasingly significant in the management of the long-term health of the dentition. What is considered as an acceptable amount of wear is dependent on the anticipated lifespan of the dentition and is, therefore, different for deciduous compared to permanent teeth. However, erosive damage to the teeth may compromise the patient's dentition for their entire lifetime and may require repeated and increasingly complex and expensive restorations. Therefore, it is important that diagnosis of the tooth wear process in children and adults is made early and that adequate preventive measures are undertaken. These measures can only be initiated when the risk factors are known and interactions between them are present.
              Article 0 comments Cited 63 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                A. Kensche: Anna.Kensche@uniklinikum-dresden.de
                Journal
                Journal ID (nlm-ta): Sci Rep
                Journal ID (iso-abbrev): Sci Rep
                Title: Scientific Reports
                Publisher: Nature Publishing Group UK (London )
                ISSN (Electronic): 2045-2322
                Publication date (Electronic): 29 November 2017
                Publication date PMC-release: 29 November 2017
                Publication date Collection: 2017
                Volume: 7
                Electronic Location Identifier: 16584
                Affiliations
                [1 ]ISNI 0000 0001 2111 7257, GRID grid.4488.0, Clinic of Operative and Pediatric Dentistry, Medical Faculty Carl Gustav Carus, TU Dresden, Fetscherstr. 74, ; D-01307 Dresden, Germany
                [2 ]Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, Saarland University, Building 73, D- 66421 Homburg/Saar, Germany
                Article
                Publisher ID: 16677
                DOI: 10.1038/s41598-017-16677-8
                PMC ID: 5707358
                PubMed ID: 29185495
                SO-VID: 06f06717-6303-43eb-b783-175730951796
                Copyright © © The Author(s) 2017
                License:

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                Date received : 11 August 2017
                Date accepted : 10 November 2017
                Categories
                Subject: Article
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                issue-copyright-statement © The Author(s) 2017

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