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The importance of measuring toothpaste abrasivity in both a quantitative and qualitative way
KTH, School of Engineering Sciences (SCI), Applied Physics, Biomedical and X-ray Physics.ORCID iD: 0000-0001-9573-2850
2013 (English)In: Acta Odontologica Scandinavica, ISSN 0001-6357, Vol. 71, no 3-4, 508-517 p.Article in journal (Refereed) Published
Abstract [en]

Objective. To evaluate the relative abrasivity of different toothpastes and polishing pastes both qualitatively and quantitatively. Materials and methods. Acrylic plates were exposed to brushing in a brushing machine with a toothpaste/water slurry for 1 and 6 h. Twelve different toothpastes were used and also four different polishing pastes. The results were evaluated using a profilometer after 1 and 6 h of brushing (corresponding to 2000 and 12 000 double strokes, respectively). A surface roughness value (Ra-value) and also a volume loss value were calculated from the profilometer measurements. These values were then correlated to each other. An unpaired t-test for the difference in the abrasion values between the toothpastes and the abrasion values over time was used. Results. The polishing paste RDA (R) 170 yielded higher Ra-values than RDA 250 (R), both after 1 and 6 h of brushing (1.01 +/- 0.22 and 8.99 +/- 1.55 compared to 0.63 +/- 0.26 and 7.83 +/- 5.89, respectively) as well as volume loss values (3.71 +/- 0.17 and 20.20 +/- 2.41 compared to 2.15 +/- 1.41 and 14.79 +/- 11.76, respectively), thus poor correlations between the RDA and Ra and Volume loss values were shown. Among the toothpastes, Apotekets (R) showed the highest Ra value after 1 h of brushing and Pepsodent (R) whitening after 6 h of brushing. Pepsodent (R) whitening also showed the highest volume loss values, both after 1 and 6 h of brushing. Conclusion. This study emphasizes the importance of not only considering the RDA value, but also a roughness value, when describing the abrasivity of a toothpaste. Furthermore, it can be concluded that so called 'whitening' toothpastes do not necessarily have a higher abrasive effect than other toothpastes.

Place, publisher, year, edition, pages
2013. Vol. 71, no 3-4, 508-517 p.
Keyword [en]
abrasivity, dentifrice, profilometer
National Category
Medical and Health Sciences
URN: urn:nbn:se:kth:diva-128498DOI: 10.3109/00016357.2012.696693ISI: 000322832200021ScopusID: 2-s2.0-84877297670OAI: diva2:648517

QC 20130916

Available from: 2013-09-16 Created: 2013-09-12 Last updated: 2013-09-16Bibliographically approved

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Liljeborg, Anders
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