Dental and Medical Problems

Dent Med Probl
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ISSN 1644-387X (print)
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Dental and Medical Problems

2019, vol. 56, nr 4, October-December, p. 343–348

doi: 10.17219/dmp/111697

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Effect of etching the coronal dentin with the rubbing technique on the microtensile bond strength of a universal adhesive system

Wpływ wytrawiania zębiny koronowej techniką wcierania na mikrorozciągliwą siłę wiązania uniwersalnego systemu adhezyjnego

Naji Kharouf1,2,A,B,C,D,F, Gautier Rapp2,B,C, Davide Mancino1,2,E,F, Joseph Hemmerlé1,C,E,F, Youssef Haikel1,2,E,F, Francois Reitzer1,2,A,C,E,F

1 Inserm UMR_S 1121, Biomaterials and Bioengineering, University of Strasbourg, France

2 Department of Conservative Dentistry and Endodontics, Faculty of Dental Medicine, University of Strasbourg, France


Background. The adhesion of composite resins to the dentin substrate is influenced by the treatment of the smear layer. While etch-and-rinse systems require dentin to be conditioned with phosphoric acid, self-etching systems preserve the smear layer by incorporating it into the adhesive layer.
Objectives. The objective of this study was to evaluate the influence of etching with the rubbing technique on the microtensile bond strength (μTBS) of a universal adhesive to dentin.
Material and Methods. Eighteen extracted teeth were selected. Two etch-and-rinse techniques (with and without rubbing) and a self-etching technique were used to bond the dentin surfaces with a universal adhesive system. After 24 h, the bonded samples were prepared for the μTBS testing. The specimens were loaded with a tensile force at a crosshead speed of 0.5 mm/min until failure. The scanning electron microscope (SEM) analyses were used to reveal the failure modes. The data were statistically analyzed with the one-way analysis of variance (ANOVA) and χ2 tests.
Results. The etch-and-rinse system with rubbing produced significantly lower bond strength (42.11 ±9.26 MPa,) than the etch-and-rinse system without rubbing (47.30 ±8.12 MPa) and significantly higher bond strength than the self-etching system (38.07 ±9.49 MPa).
Conclusion. Under the conditions of this study, dentin etched with phosphoric acid for 3 s in the etchandrinse mode with the rubbing technique for a universal adhesive system decreases the μTBS of the composite to dentin.

Key words

etching, phosphoric acid, universal adhesive, rubbing technique

Słowa kluczowe

wytrawianie, kwas fosforowy, uniwersalny materiał adhezyjny, technika wcierania

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