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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Role of Chlorhexidine in Bond Strength to Artificially Eroded Dentin Over Time

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Author(s):
Francisconi-dos-Rios, Luciana Favaro [1] ; Caroll Casas-Apayco, Leslie [2] ; Calabria, Marcela Pagani [3] ; Silveria Francisconi, Paulo Afonso [4] ; Sanches Borges, Ana Flavia [4] ; Wang, Linda [4]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Dept Operat Dent, Sch Dent, Sao Paulo, SP - Brazil
[2] Peruvian Univ Appl Sci, Lima - Peru
[3] Univ Sagrado Coracao, Dept Operat Dent, Sch Dent, Bauru, SP - Brazil
[4] Univ Sao Paulo, Dept Operat Dent Endodont & Dent Mat, Bauru Sch Dent, Bauru, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of Adhesive Dentistry; v. 17, n. 2, p. 133-139, 2015.
Web of Science Citations: 12
Abstract

Purpose: To assess the long-term effect of a 2% aqueous chlorhexidine (CHX) solution on bond strength to artificially eroded dentin compared to sound dentin. Materials and Methods: Flat mid-coronal dentin surfaces of extracted third molars (n = 28) were subjected only to grinding with a 600-grit SiC paper for 1 min (sound dentin S, n = 14) or additionally to erosive pH cycling with a cola-based soft-drink (eroded dentin E, n = 14). After acid etching, rinsing, and air drying, S and E were rehydrated with 1.5 mu l of 2% CHX (S2%, n = 7; E2%, n = 7) or of distilled water (control SC, n = 7; EC, n = 7). Composite buildups were incrementally constructed with Filtek Z350 following Adper Single Bond 2 application. Specimens were sectioned into beams, which were subjected to microtensile testing immediately or after 6 or 12 months of aging. Fractured surfaces were observed under a digital microscope (50X magnification). Microtensile bond strength (mu TBS) (MPa) was analyzed by three-way ANOVA and Tukey's tests (a = 0.05) and failure mode by the Kruskal-Wallis test (a = 0.05). Results: Compared to sound dentin, eroded dentin was consistently related to lower mu TBS. Immediately and after 12-month aging, the effect of CHX was insignificant, but it was significant after 6-month aging, when it conserved the bond strength to both eroded and sound dentin. The percentage of adhesive and mixed failures were equivalent, and significantly more frequent than cohesive failures, whether in dentin or in composite. Conclusion: The 2% CHX effect on bond strength conservation to both eroded and sound dentin was not found to be persistent. (AU)

FAPESP's process: 09/14986-0 - In vitro evaluation of different concentrations of clorhexidine on bonding strenght to normal and eroded dentin
Grantee:Linda Wang
Support Opportunities: Regular Research Grants