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Materials 2016, 9(7), 547; doi:10.3390/ma9070547

Repair Bond Strength of Aged Resin Composite after Different Surface and Bonding Treatments

1
Dental Clinic 1-Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen 91054, Germany
2
Department of Restorative Dentistry, Faculty of Dentistry, University of Concepción, Concepción 4070369, Chile
*
Author to whom correspondence should be addressed.
Academic Editor: Georgios E. Romanos
Received: 15 June 2016 / Revised: 27 June 2016 / Accepted: 30 June 2016 / Published: 7 July 2016
(This article belongs to the Section Biomaterials)
View Full-Text   |   Download PDF [3044 KB, uploaded 7 July 2016]   |  

Abstract

The aim of this study was to compare the effect of different mechanical surface treatments and chemical bonding protocols on the tensile bond strength (TBS) of aged composite. Bar specimens were produced using a nanohybrid resin composite and aged in distilled water for 30 days. Different surface treatments (diamond bur, phosphoric acid, silane, and sandblasting with Al2O3 or CoJet Sand), as well as bonding protocols (Primer/Adhesive) were used prior to application of the repair composite. TBS of the specimens was measured and the results were analyzed using analysis of variance (ANOVA) and the Student–Newman–Keuls test (α = 0.05). Mechanically treated surfaces were characterized under SEM and by profilometry. The effect of water aging on the degree of conversion was measured by means of FTIR-ATR spectroscopy. An important increase in the degree of conversion was observed after aging. No significant differences in TBS were observed among the mechanical surface treatments, despite variations in surface roughness profiles. Phosphoric acid etching significantly improved repair bond strength values. The cohesive TBS of the material was only reached using resin bonding agents. Application of an intermediate bonding system plays a key role in achieving reliable repair bond strengths, whereas the kind of mechanical surface treatment appears to play a secondary role. View Full-Text
Keywords: aged resin composite; bonding agent; resin composite repair; surface treatment; tensile bond strength aged resin composite; bonding agent; resin composite repair; surface treatment; tensile bond strength
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wendler, M.; Belli, R.; Panzer, R.; Skibbe, D.; Petschelt, A.; Lohbauer, U. Repair Bond Strength of Aged Resin Composite after Different Surface and Bonding Treatments. Materials 2016, 9, 547.

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