Formation of protective deposits by anti‐erosive toothpastes—A microscopic study on enamel with artificial defects

Abstract

This study investigated formation of protective deposits on the enamel surface after application of several anti-erosive toothpastes with different active ingredients. NaF-containing Sensodyne Pronamel, SnCl /F-based Elmex Erosion Protection and calcium phosphate-based BioRepair Plus Sensitivity Control, SensiShield and Enamel Care toothpastes with claimed anti-erosive properties were tested. Artificial saliva and Elmex Erosion Protection mouth rinse served as control groups. The toothpastes were applied 30 times by a toothbrush for 2 min per day, mouth rinse for 30 s on polished enamel of thirty five human molars (n = 5) with series of five rhomboid-shaped indents of various length prepared by a Knoop indentor. After 15 and 30 applications, the shape of the indents and surface morphology was characterised using light and scanning electron microscopy. At the end of treatment, the samples were exposed to 0.2 wt. % citric acid (pH 3.30) to test resistance of the treated enamel to erosion. Pronounced differences were observed between protective properties of the toothpastes. While Sensodyne Pronamel and BioRepair Plus Sensitivity Control did not produce any protective deposits, Enamel Care formed a compact layer of deposits which protected the enamel surface against erosion. With Elmex Erosion Protection and SensiShield fractured indent edges and scratches on the treated enamel suggested that their abrasive properties prevailed over ability of active ingredients to form deposits. These results revealed that toothpastes with strong potential to form acid-resistant deposits on the enamel surface and of low abrasivity should be used for effective prevention of enamel erosion. SCANNING 38:380-388, 2016. © 2015 Wiley Periodicals, Inc.

Treatment for dental erosion: a systematic review of in vitro studies

“…Two studies did not realize the intervention group ( Austin et al, 2014 ; Passos, Rodrigues & Santiago, 2018 ), and three evaluated primary teeth ( Elwardani, Harhash & Zaky, 2019 ; Maden et al, 2017 ; Rallan et al, 2013 ), conflicting with the previously established eligibility criteria. Finally, four studies were selected in this systematic review according to the eligibility criteria ( Bradna et al, 2015 ; João Souza et al., 2017 ; Panich & Poolthong, 2009 ; Ranjitkar et al, 2009 ) ( Fig. 1 ).…”

Surface characteristics of a modified acidulated phosphate fluoride gel with nano‐hydroxyapatite coating applied on bovine enamel subjected to an erosive environment

“…The significant increase in Ra observed after APF treatment (Figure ) can be attributed to the precipitation of deposits formed by the fluoride treatments (CaF 2 ‐like cubes precipitate), which remained after erosion (Rošin‐Grget & Linčir, ). The mechanism of action of conventional fluoride products can explain this deposition, which increases surface roughness because the fluoride ions form fluoridated apatites in the enamel structure and accelerate the deposition of CaF 2 ‐like material and calcium phosphates (CaPs) from the supersaturated saliva (Bradna, Vrbova, Fialova, Housova, & Gojisova, ; Cate, ; Ten Cate & Featherstone, ).…”

Influence of Calcium Phosphate and Apatite Containing Products on Enamel Erosion

“…The efficacy of toothpastes and mouthwashes containing hydroxyapatite microclusters in promoting the deposition of a carbonate-hydroxyapatite particle coating on eroded enamel has already been under investigation in vitro [ 17 , 18 ]. However, uncertainty remains about the sustainability of such mineral deposits and there is sparse evidence for the efficacy of this approach in vivo or in situ [ 19 ]. Furthermore it has been suggested that the addition of hydroxyapatite nanoparticles to an erosive soft drink significantly decreases its erosive potential by providing a calcium and phosphate supersaturation [ 20 ].…”