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Hydrolytic stability of three-step etch-and-rinse adhesives in occlusal class-I cavities

Journal Contribution - Journal Article

Objectives A dental adhesive without small and hydrophilic monomers such as HEMA and 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. On 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.
Journal: Clinical Oral Investigations
ISSN: 1432-6981
Issue: 8
Volume: 17
Pages: 1911 - 1918
Publication year:2013