Influence of Erosion/Abrasion and the Dentifrice Abrasiveness Concomitant with Bleaching Procedures.
bleaching
dentin
enamel
erosion
wear
Journal
Clinical, cosmetic and investigational dentistry
ISSN: 1179-1357
Titre abrégé: Clin Cosmet Investig Dent
Pays: New Zealand
ID NLM: 101579785
Informations de publication
Date de publication:
2020
2020
Historique:
received:
15
10
2019
accepted:
04
02
2020
entrez:
14
4
2020
pubmed:
14
4
2020
medline:
14
4
2020
Statut:
epublish
Résumé
The aim of this study was to evaluate the effect of erosive/abrasive cycles and two different levels of abrasiveness of dentifrices over enamel and dentin subjected to bleaching. Enamel and dentin bovine specimens were prepared and submitted to an at-home bleaching treatment using 9.5% hydrogen peroxide gel, which was applied daily (30 min/14 days). Concomitant with bleaching, an erosive cycle was performed using citric acid (0.3%, pH 3.8, 5 mins, 3×/day), followed by immersions in artificial saliva for remineralization (30 mins). Abrasion was done with two (high and low abrasiveness) dentifrices (2×/day, 120 seconds) after the first and third erosive immersion each day. Enamel and dentin softening were assessed by microhardness and erosive tooth wear by optical profilometry. Data were submitted to repeated measures ANOVA, followed by the Tukey's test with a significance level of 5%. For the enamel and considering the erosive-abrasive cycle, significant differences were found between the groups tested, the bleaching, and the abrasiveness of the dentifrice tested; however, the final microhardness values were significantly lower than the initial ones. For dentin, differences were found between the eroded/abrasion and the non-eroded/abrasion groups, with the former presenting lower microhardness values compared with the latter. In addition, bleaching decreased the microhardness values only for the highly abrasive dentifrice, and the final values were lower than for the initial ones for all tested groups. The use of high and low abrasiveness dentifrices during bleaching and concomitant with erosion/abrasion cycles is more harmful to dentin than to enamel. Although bleaching is considered a conservative treatment, it can cause deleterious effects to dental hard tissue. The association of an at-home bleaching technique with erosion and high- or low- abrasive dentifrices harms dentin more than enamel.
Identifiants
pubmed: 32280280
doi: 10.2147/CCIDE.S234716
pii: 234716
pmc: PMC7132029
doi:
Types de publication
Journal Article
Langues
eng
Pagination
101-109Informations de copyright
© 2020 Liporoni et al.
Déclaration de conflit d'intérêts
The authors report no conflicts of interest in this work.
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