Document Detail

Effect of a bonding resin layer associated with a self-etching adhesive system on the bond strength of indirect restorations.
MedLine Citation:
PMID:  19089109     Owner:  NLM     Status:  In-Data-Review    
The aim of this study was to evaluate the influence of a low-viscosity bonding resin applied over a self-etching adhesive system on the microtensile bond strength (microTBS) of indirect restorations. Comparisons were made using One Up Bond F (OB) self-etching adhesive system, Single Bond (SB) one-bottle adhesive system and Scotchbond Multi Purpose Plus (SMP) bonding component. Thirty bovine incisors were extracted and decoronated at the cementoenamel junction. The labial surfaces were ground so that superficial dentin and deep dentin were exposed. The specimens were randomized to three groups (n=10): G1- OB; G2- OB + SMP; G3- SB. In G2, a layer of the SMP bonding was applied over the OB adhesive system. Indirect composite restorations were bonded using dual-cure cement under 500 g load for 5 min. The specimens were serially sectioned with a bonding area of +/- 1.0 mm(2) in 3 regions: enamel (E), superficial dentin (SD) and deep dentin (DD). The sticks were fixed with cyanoacrylate adhesive and submitted to microTBS test at a crosshead speed of 0.5 mm/min in a mechanical testing machine (EMIC DL 2000). The fractured specimens were examined under scanning electron microscopy to determine the failure mode. Data were analyzed by one-way ANOVA followed by Tukey's test (p<0.05). microTBS means (in MPa) were: G1/E: 15.5 +/- 3.5b; G1/SD: 22.7 +/- 7.6a; G1/DD: 19.4 +/- 9.4a; G2/E: 15.9 +/- 5.8b; G2/SD: 19.9 +/- 6.9a; G2/DD: 15.3 +/- 4.9a; G3/E: 23.2 +/- 7.3a; G3/SD: 20.4 +/- 8.2a; G3/DD: 19.1 +/- 8.7a. The results showed that the use of a low viscosity bonding resin did not affect the microTBS means when associated with a self-etching adhesive system. The self-etching adhesive system was significantly more efficient in dentin than in enamel, while the one-bottle system was significantly more efficient in enamel when compared to the self-etching adhesive system.
Carolina Guimarães Castro; Paulo César Freitas Santos Filho; Adérito Soares da Mota; Roberto Elias Campos; Carlos José Soares
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied oral science : revista FOB     Volume:  15     ISSN:  1678-7765     ISO Abbreviation:  J Appl Oral Sci     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2008-12-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101189774     Medline TA:  J Appl Oral Sci     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  94-8     Citation Subset:  -    
Dental School, Federal University of Uberlândia, Uberlândia, MG, Brazil.
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