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J Clin Periodontol. 2001 Apr;28(4):360-4.

Toothbrush filaments end-rounding: stereomicroscope analysis.

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School of Dentistry, Department of Oral Surgery, University of Bologna, Italy.



Toothbrush filaments with rounded ends allow for efficient removal of bacterial plaque and are less harmful to periodontal tissues than non-rounded bristles. The aim of this research was to evaluate the % of rounded filaments considered to be of acceptable quality in different toothbrush brands and to determine whether there is a standardization of quality, as manufacturers claim.


Brushes tested included 2 samples of medium-hard nylon or tynex toothbrushes from 31 various types found on the retail market in Italy. Tufts from the same position on the toothbrush head were removed and examined under a stereomicroscope, utilizing methods which did not alter the physical properties of the filaments. In 4 of the 31 toothbrush brands tested, more than 50% of the filaments appeared rounded, in 19 of them, between 11.9% and 40.5% and in 8 brands between 0% and 7%.


Differences were found in the number and disposition of filaments among different brands and even within the same toothbrush brand.


The results appear to indicate that a large % of toothbrushes on the retail market do not meet acceptable quality criteria.

[Indexed for MEDLINE]

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