Abstract:
OBJECTIVES:The purpose of this study was to determine enamel and dentin bond durability after long-term water storage using self-etch adhesives. METHODS:Two single step self-etch adhesives (SU, Scotchbond Universal and GB, G-ӕnial Bond) and a two-step self-etch adhesive (OX, OptiBond XTR) were used. The shear bond strength (SBS) and shear fatigue strength (FS) of the enamel and dentin were obtained with and without phosphoric acid pre-etching prior to application of the adhesives. The specimens were stored in distilled water at 37 °C for 24 h, 6 months, and one year. A staircase method was used to determine the FS using a frequency of 10 Hz for 50,000 cycles or until failure occurred. RESULTS:The SBS and FS of enamel bonds were significantly higher with pre-etching, when compared to no pre-etching for the same water storage period. The FS of dentin bonds with pre-etching tended to decrease relative to no pre-etching at the same storage period. For the one year storage period, SU and GB with pre-etching showed significantly lower FS values than the groups without pre-etching. CONCLUSIONS:The influence of water storage on FS of the self-etch adhesives was dependent on the adhesive material, storage period and phosphoric acid pre-etching of the bonding site. CLINICAL SIGNIFICANCE:Phosphoric acid pre-etching of enamel improves the effectiveness of self-etch adhesive systems. Inadvertent contact of phosphoric acid on dentin appears to reduce the ability of self-etch adhesives to effectively bond resin composite materials.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Takamizawa T,Barkmeier WW,Tsujimoto A,Scheidel DD,Watanabe H,Erickson RL,Latta MA,Miyazaki Mdoi
10.1016/j.jdent.2015.10.018subject
Has Abstractpub_date
2015-12-01 00:00:00pages
1416-27issue
12eissn
0300-5712issn
1879-176Xpii
S0300-5712(15)30064-6journal_volume
43pub_type
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