Abrasion of eroded dentin caused by toothpaste slurries of different abrasivity and toothbrushes of different filament diameter

Wiegand, Annette; Kuhn, Mirjam; Sener, Beatrice; Roos, Malgorzata; Attin, Thomas

doi:10.1016/j.jdent.2009.03.005

« Previous Next »Journal of Dentistry
Volume 37, Issue 6 , Pages 480-484, June 2009

Abrasion of eroded dentin caused by toothpaste slurries of different abrasivity and toothbrushes of different filament diameter

Annette Wiegand
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zürich, Plattenstrasse 11, 8032 Zürich, Switzerland
- Corresponding author. Tel.: +41 44 634 32 71; fax: +41 44 634 43 08.
Mirjam Kuhn
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zürich, Plattenstrasse 11, 8032 Zürich, Switzerland
Beatrice Sener
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zürich, Plattenstrasse 11, 8032 Zürich, Switzerland
Malgorzata Roos
- Biostatistics Unit, Institute of Social and Preventive Medicine, University of Zürich, Hirschengraben 84, 8001 Zürich, Switzerland
Thomas Attin
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zürich, Plattenstrasse 11, 8032 Zürich, Switzerland

Received 9 January 2009; received in revised form 10 March 2009; accepted 11 March 2009.

Abstract

Objective

This study aimed to evaluate the impact of toothpaste slurry abrasivity and toothbrush filament diameter on abrasion of eroded dentin in vitro.

Methods

Eroded dentin samples (hydrochloric acid, pH 2.6, 15s) were brushed with 40 strokes in an automatic brushing machine using manual toothbrushes with different filament diameter (0.15, 0.20 or 0.25mm). The toothbrushes were applied with a control slurry free of abrasive particles (RDA-value 10) or toothpastes slurries with different abrasivity (RDA-values 20, 50 or 100). Each erosive–abrasive cycle was followed by storage of the dentin samples in artificial saliva for 3h. After each 4 cycles, the samples were stored in artificial saliva for 15h. After 60 cycles, dentin loss was measured by profilometry and statistically analysed by ANOVA and linear regression analysis.

Results

Dentin loss increased along with the RDA-value of the toothpaste slurries. The impact of the filament diameter on dentin loss was less evident compared to the RDA-value. However, toothbrushes with smaller filament stiffness caused higher dentin wear in all toothpaste slurry groups (RDA 20, 50 and 100) except for the paste-free control group (RDA 10).