Resistance of ten contemporary adhesives to resin–dentine bond degradation

Osorio, Raquel; Pisani-Proenca, Jatyr; Erhardt, Maria Carolina G.; Osorio, Estrella; Aguilera, Fátima S.; Tay, Franklin R.; Toledano, Manuel

doi:10.1016/j.jdent.2007.12.002

« PreviousJournal of Dentistry
Volume 36, Issue 2 , Pages 163-169, February 2008

Resistance of ten contemporary adhesives to resin–dentine bond degradation

Raquel Osorio
- Department of Dental Materials, Campus de Cartuja s/n, School of Dentistry, University of Granada, Granada, Spain
Jatyr Pisani-Proenca
- Department of Dental Materials, Campus de Cartuja s/n, School of Dentistry, University of Granada, Granada, Spain
Maria Carolina G. Erhardt
- Department of Dental Materials, Campus de Cartuja s/n, School of Dentistry, University of Granada, Granada, Spain
Estrella Osorio
- Department of Dental Materials, Campus de Cartuja s/n, School of Dentistry, University of Granada, Granada, Spain
Fátima S. Aguilera
- Department of Dental Materials, Campus de Cartuja s/n, School of Dentistry, University of Granada, Granada, Spain
Franklin R. Tay
- Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, USA
Manuel Toledano
- Department of Dental Materials, Campus de Cartuja s/n, School of Dentistry, University of Granada, Granada, Spain
- Corresponding author at: Av. de las Fuerzas Armadas 1, 1B, 18014 Granada, Spain. Tel.: +34 958243788; fax: +34 958240908.

Received 26 November 2007; accepted 3 December 2007.

Abstract

Objectives

To evaluate resin–dentine bond degradation after 1 year of water storage.

Methods

Human dentine surfaces were bonded with two etch-and-rinse self-priming adhesives (Single Bond/SB and Prime & Bond NT/PBNT), three 2-step self-etching adhesives (Clearfil SE Bond/SEB, Resulcin Aqua Prime/RES and Non-Rinse Conditioner with Prime & Bond NT/NRC-PBNT), and five 1-step self-etching adhesives (Etch & Prime 3.0/EP, Prompt L-Pop/PLP, Solist/SOL, Futurabond/FUT and AQ Bond/AQ). Adhesives were applied according to manufacturers’ instructions. Composite build-ups were constructed and the bonded teeth were stored (24h, 6 months, 1 year) in distilled water at 37°C. After storage, the intact teeth were sectioned into beams and all specimens were tested for microtensile bond strengths (MTBS). ANOVA and multiple comparisons tests were applied at α=0.05. Fractographic analysis of debonded beams was performed using scanning electron microscopy.

Results

SB, PBNT and SEB attained the highest MTBS, regardless of the storage period. A significant decrease in MTBS was observed after 6 months for SOL. After 12 months the only groups that did not reduce bond strength were SB and SEB. Bonded specimens in NRC-PBNT, RES and FUT produced pre-testing failures after 12 months, and MTBS could not be measured.

Conclusions

The resistance of resin–dentine bonds to degradation is material-dependent. When the enamel–resin interface is preserved, the etch-and-rinse adhesives and the mild 2-step self-etch adhesive SEB exhibited the best resin–dentine bond durability. Those tested self-etching adhesives having a pH≤1 and using water or acetone as solvent attained catastrophic bond failure after 1 year of water storage.

Keywords: Adhesion, Dentine, Self-etch, Etch-and-rinse, Bond strength, Degradation, Microtensile