Abstract
Objectives
A dental adhesive without small and hydrophilic monomers such as 2-hydroxyethyl methacrylate (HEMA) and triethylene glycol dimethacrylate (TEGDMA) would be beneficial in order to avoid contact allergies. However, these monomers are important to increase infiltration and polymerization of the adhesive. Therefore, the purpose of this study was to evaluate the bonding effectiveness and bond durability of a more hydrophobic and biocompatible adhesive as compared to a conventional three-step etch-and-rinse adhesive.
Methods
Sixteen non-carious human third molars were used to determine the micro-tensile bond strength testing (μTBS) and interfacial ultrastructure by transmission electron microscopy (TEM) of the more hydrophobic cmf adhesive system (Saremco) adhesive as compared to the control OptiBond FL (Kerr).
Results
The more hydrophobic and biocompatible three-step etch-and-rinse adhesive was able to produce a reasonable short-time bonding effectiveness. In the long term, the collagen fibrils in the hybrid layer were not effectively protected and were prone to hydrolytic degradation. As a result, long-term bonding effectiveness of this novel adhesive was very low.
Conclusions
Application of a more hydrophobic adhesive without altering the application procedure considerably results in a reduced durability of the created bond
Clinical relevance
Omitting small and hydrophilic components from the adhesive formulation may impair the durability of your composite restoration.
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Acknowledgements
We thank Ms. Rolande Renwart and Ms. Christiane Armee (Pathology Department, University Hospital of Leuven) for extensive technical assistance. We thank the manufacturers of dental adhesives and composites for their generous donation.
Conflict of interest
The authors declare that they have no conflicts of interest regarding the products herein investigated.
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De Munck, J., Mine, A., Vivan Cardoso, M. et al. Hydrolytic stability of three-step etch-and-rinse adhesives in occlusal class-I cavities. Clin Oral Invest 17, 1911–1918 (2013). https://doi.org/10.1007/s00784-012-0884-0
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DOI: https://doi.org/10.1007/s00784-012-0884-0