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Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry
Published on: February 2, 2018
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Effects of Experimental Polymer-Based Fluoride Varnishes Against Erosive Tooth Wear
Operative Dentistry
|February 27, 2026
Summary
New experimental varnishes combining film-forming polymers and fluoride effectively protect against tooth enamel wear. These novel fluoride varnishes demonstrated protection comparable to a commercial product in laboratory tests.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Oral Health Research
Background:
- Fluoride varnishes are used to prevent dental caries and tooth wear.
- Film-forming polymers may enhance the protective properties of fluoride varnishes.
- Erosive tooth wear is a significant clinical concern, often exacerbated by abrasive factors.
Purpose of the Study:
- To evaluate experimental varnishes containing fluoride and polymethacrylate copolymers for their ability to control enamel wear under erosive-abrasive conditions.
- To compare the efficacy of these experimental varnishes against a commercial fluoride varnish and controls.
Main Methods:
- Bovine enamel specimens were subjected to demineralization and then treated with experimental varnishes (containing amino methacrylate copolymer or methyl methacrylate copolymer with or without sodium fluoride) or a commercial varnish.
- Specimens underwent a nine-day erosive-abrasive cycling protocol simulating oral conditions, including acid exposure and toothbrushing.
- Surface loss was measured using contact profilometry, and KOH-soluble fluoride was quantified.
Main Results:
- Experimental varnishes with sodium fluoride (AMC+NaF, MMC+NaF) and the commercial varnish (Duraphat) significantly reduced enamel surface loss compared to controls.
- The efficacy of the experimental AMC+NaF and MMC+NaF varnishes was comparable to Duraphat.
- While AMC+NaF showed lower KOH-soluble fluoride than MMC+NaF, Duraphat's fluoride levels were not significantly different from either experimental group.
Conclusions:
- Polymethacrylate copolymer-based varnishes containing sodium fluoride offer significant in vitro protection against enamel erosive-abrasive wear.
- These experimental fluoride varnishes exhibit comparable efficacy to a leading commercial product.
- The formulation of film-forming polymers with fluoride presents a promising strategy for enhancing protection against erosive tooth wear.
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