Does the application of dimethyl sulfoxide improve resin bonding to eroded dentine? Four-year in vitro evaluation.

Autor: Wendlinger M; Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M, Ponta Grossa, Brazil., Cardenas AFM; Department of Restorative Dentistry, Ceuma University, R. Anapurus 1, Renascença II, São Luís, Maranhão, Brazil., Figueredo de Siqueira FS; Department of Restorative Dentistry, Ceuma University, R. Anapurus 1, Renascença II, São Luís, Maranhão, Brazil., Moreira PHA; Department of Restorative Dentistry, Ceuma University, R. Anapurus 1, Renascença II, São Luís, Maranhão, Brazil., Trovão MMA; Department of Restorative Dentistry, Ceuma University, R. Anapurus 1, Renascença II, São Luís, Maranhão, Brazil., Stape THS; Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, and Turku University Hospital, TYKS, Turku, Finland., Tezvergil-Mutluay A; Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, and Turku University Hospital, TYKS, Turku, Finland., Loguercio AD; Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M, Ponta Grossa, Brazil. Electronic address: aloguercio@hotmail.com.
Jazyk: angličtina
Zdroj: Dental materials : official publication of the Academy of Dental Materials [Dent Mater] 2023 Nov; Vol. 39 (11), pp. 1051-1057. Date of Electronic Publication: 2023 Oct 02.
DOI: 10.1016/j.dental.2023.09.014
Abstrakt: Objective: To evaluate the effect of dimethyl sulfoxide (DMSO) on the microtensile bond strength (µTBS) and nanoleakage (NL) of universal adhesives on eroded dentine, immediately and after four years of water storage.
Methods: Sixty-four sound human molars were distributed into 16 groups according to (1) Dentine surface (sound and eroded dentine); (2) dimethyl sulfoxide application (with or without); (3) Application mode (etch-and-rinse or self-etch) and (4) Storage time (immediate and four years). One mild universal adhesive was used (Scotchbond Universal). The restoration was then performed with a composite resin and the specimens were sectioned into resin-dentine bonded sticks. Resin-dentine bonded sticks were tested (immediately and after four years of water storage) for µTBS (0.5 mm/min) or used to assess NL. Data on μTBS and NL were analyzed using four-way ANOVA and Tukey's test (α = 0.05).
Results: Only the 3-way cross-product interaction 'substrate vs DMSO vs time' was statistically significant (p = 0.007). Eroded dentine showed a lower mean of µTBS and a higher mean of NL values than sound dentine. However, when DMSO was applied, no significant decrease of μTBS or NL values was observed after four years of water storage, regardless of adhesive strategies, or dentine evaluated, when compared to immediate results.
Significance: Water-based DMSO pre-treatments not only prevent degradation of MDP-containing simplified adhesives but also serve as a potential alternative to improve long-term bonding properties to eroded dentine. The versatility of using a single pre-treatment for both self-etch or etch-and-rinse bonding to eroded dentin may facilitate future clinical applications.
(Copyright © 2023 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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