The measurement of enamel wear by four toothpastes.

Abstract:

OBJECTIVES:To determine the enamel abrasivity of three whitening toothpastes and a silica toothpaste and to measure the brushing forces used. METHODS:Polished human enamel blocks were indented with a Knoop diamond and attached to dentures of adult volunteers. The blocks were brushed ex vivo, twice per day with either a whitening toothpaste containing Perlite (White System), a commercial whitening toothpaste (A and B) or a silica toothpaste. After four and twelve-weeks, one block per subject was removed and the Knoop indent remeasured. From the changes in the indent length, the amount of enamel wear was calculated. RESULTS:The mean enamel wear (sd) for White System, silica toothpaste, whitening toothpaste A and B after four-weeks was 0.14 (0.15), 0.09 (0.16), 0.14 (0.12) and 0.89 (0.93) and after twelve-weeks was 0.24 (0.21), 0.37 (0.73), 0.36 (0.52) and 1.04 (0.98) microm respectively. After four-weeks, the differences in enamel wear between whitening toothpaste B and all other toothpastes were of statistical significance (p < 0.003), but not after twelve-weeks. The mean ex vivo normal brushing force (sd) was 2.67 (1.33) N. CONCLUSIONS:All three whitening toothpastes did not give significantly more enamel wear than a silica toothpaste after twelve-weeks in situ with ex vivo brushing.

journal_name

Int Dent J

authors

Joiner A,Pickles MJ,Lynch S,Cox TF

doi

10.1111/j.1875-595x.2008.tb00173.x

subject

Has Abstract

pub_date

2008-02-01 00:00:00

pages

23-8

issue

1

eissn

0020-6539

issn

1875-595X

journal_volume

58

pub_type

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