alexa The Evaluation of Sodium Lauryl Sulphate in Toothpaste on Toxicity on Human Gingiva and Mucosa: A 3D in vitro Model | OMICS International | Abstract
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Research Article

The Evaluation of Sodium Lauryl Sulphate in Toothpaste on Toxicity on Human Gingiva and Mucosa: A 3D in vitro Model

Bart Vande Vannet1*, Bart De Wever2, Els Adriaens3, Frans Ramaeckers2 and Peter Bottenberg4

1Department of Orthodontics, Free University of Brussels, Laarbeeklaan 103, 1090 Brussels, Belgium

2Department of Molecular Cell Biology, GROW, University of Maastricht, The Netherlands

3Lab Pharmaceutical Technology, University of Ghent, Gent, Belgium

4Department of Restorative and Preventive Dentistry, Free University of Brussels, Laarbeeklaan 103, 1090 Brussels, Belgium

*Corresponding Author:
Bart Vande Vannet, DDS, MSc, PhD
Professor, Vrije Universiteit Brussel
Orthodontie, Laarbeeklaan 103, Brussel, 1090, Belgium
Tel: +3224774908
Fax: +3224774908
E-mail: [email protected]

Received date: July 08, 2015; Accepted date: July 28, 2015; Published date: August 09, 2015

Citation: Vannet BV, De Wever B, Adriaens E, Ramaeckers F, Bottenberg P (2015) The Evaluation of Sodium Lauryl Sulphate in Toothpaste on Toxicity on Human Gingiva and Mucosa: A 3D in vitro Model. Dentistry 5:325. doi: 10.4172/2161-1122.1000325

Copyright: © 2015 Vannet BV, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Five different commercial toothpaste formulations were labeled as A, B, C, D and E and evaluated for toxicity in vitro using reconstituted human oral and gingival mucosa cultures. Toothpastes A, D and E contained sodium lauryl sulphate (SLS) while toothpastes B and C did not. All toothpastes contained fluoride in different quantities. Tissue viability (MTT), tissue morphology (LM and TEM) and release of pro-inflammatory mediator IL-1α were evaluated. For gingival mucosa, topical exposure of toothpastes did not affect MTT values. Examination of oral mucosa however, showed that toothpastes B, E and D induced a significant loss of viability after 1 h (49.2%, 55.5% and 78.4% respectively) (p<0.05). After 3 hours toothpaste B demonstrated a 51.4% loss of viability whereas tissue viability for toothpastes D and E dropped to 11.1% and 4.5% respectively. The release of pro-inflammatory mediator IL-1α showed that only gingival mucosa tissues exposed to toothpaste D and E showed a marked increase of IL-1α after 1 hour, and toothpaste A, D and E after 3 h exposure. Oral mucosa tissue exposed for 1 h resulted in increased levels of IL-1α for toothpastes A, B, D and E, which became more important at 3 h. Morphological analysis of the oral mucosa demonstrated partial necrosis after exposure to toothpastes A, B and C, and severe necrosis to D and E. MTT cannot be used as single toxicity parameter and should be confirmed by histology. Both in vitro oral and gingival mucosa models are suitable to evaluate the toxicity of toothpaste formulations. The presence of SLS in toothpaste formulations is presumably responsible for the toxicity observed in vitro. MTT, IL-1α release and morphology were affected by the SLS containing toothpastes A, D and E. These observations confirm clinical inflammatory effects of SLS in oral care products often reported in literature.

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