Pascaretti-Grizon F, Mabilleau G, Chappard D. Abrasion of 6 dentifrices measured by vertical scanning interference microscopy.
J Appl Oral Sci 2013;
21:475-81. [PMID:
24212995 PMCID:
PMC3881835 DOI:
10.1590/1679-775720130204]
[Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 08/12/2013] [Indexed: 11/22/2022] Open
Abstract
Objectives
The abrasion of dentifrices is well recognized to eliminate the dental plaque. The
aims of this study were to characterize the abrasive powders of 6 dentifrices (3
toothpastes and 3 toothpowders) and to measure the abrasion on a test surface by
Vertical Scanning Interference microscopy (VSI).
Material and Methods
Bright field and polarization microscopy were used to identify the abrasive
particles on the crude dentifrices and after prolonged washes. Scanning electron
microscopy and microanalysis characterized the shape and nature of the particles.
Standardized and polished blocks of poly(methylmethacrylate) were brushed with a
commercial electric toothbrush with the dentifrices. VSI quantified the mean
roughness (Ra) and illustrated in 3D the abraded areas.
Results
Toothpastes induced a limited abrasion. Toothpowders induced a significantly
higher roughness linked to the size of the abrasive particles. One powder
(Gencix® produced a high abrasion when used with a standard testing
weight. However, the powder is based on pumice particles covered by a plant
homogenate that readily dissolves in water. When used in the same volume, or after
dispersion in water, Ra was markedly reduced.
Conclusion
Light and electron microscopy characterize the abrasive particles and VSI is a new
tool allowing the analysis of large surface of abraded materials.
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