Joiner A, Collins LZ, Cox TF, Pickles MJ, Weader E, Liscombe C, Holt JS. The measurement of enamel and dentine abrasion by tooth whitening products using an in situ model.
Int Dent J 2005;
55:194-6. [PMID:
16004253 DOI:
10.1111/j.1875-595x.2005.tb00059.x]
[Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES
To determine the enamel and dentine wear of two whitening toothpastes using an in situ model with ex vivo brushing.
METHODS
Human enamel/dentine (approximately 50:50) blocks (approximately 4 x 4mm) were placed in the upper buccal aspects of full or partial dentures of a group of 25 subjects. Subjects brushed the specimens ex vivo with either a calcium carbonate/perlite or silica containing whitening toothpaste under exaggerated conditions as compared to normal for 30 s, twice per day. Specimens were removed after 4, 8 and 12 weeks and the wear to the enamel and dentine was determined. Enamel wear was determined by change in Knoop indent length and dentine wear was determined from the enamel-dentine step height, measured using optical profilometry.
RESULTS
The mean wear after 12 weeks was for enamel 0.27 and 0.19 microns, and for dentine 34.3 and 61.1 microns, for the calcium carbonate/perlite and silica toothpastes respectively. There were no significant differences between products after 12 weeks. The rate of wear was found to decrease throughout the duration of the study.
CONCLUSION
There were no significant differences between the two whitening toothpastes in terms of enamel and dentine wear after 12 weeks brushing.
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