Bond Strength of an Etch-and-rinse Adhesive to Different Dentin Substrates
Objective:to evaluate in vitrothe μTBS of an etch-and-rinse adhesive system to sound dentin, caries-affected and caries-infected dentin over time.
Method: Twenty-four dentin surfaces obtained from sound third molars were divided into 3 groups: sound dentin (Sd), caries-affected dentin (Ca), and caries-infected dentin (Ci). Ca and Ci groups were submitted to artificial caries development (broth culture with S. mutans). Carious tissue was removed using spherical drills and visual inspection with Caries Detector solution. It was considered as Ci (soft and deeply pigmented dentin) and Ca (hard and slightly pigmented dentin). The adhesive system was applied and the composite blocks were built. Teeth were stored in deionized water for 24 h at 37º C and sectioned into beams (1.0 mm2). The specimens were randomized and divided into three water storage periods: 24 hours, 6 months, or 1 year. Specimens were submitted to µTBS using EZ test machine at a crosshead speed of 0.5 mm/min. Failure mode was examined by SEM. Data from µTBS and failure mode were submitted to 2-way ANOVA and Tukey’s HSD and Fisher’ Exact tests (α=0.05). Bonding interfaces were analyzed by SEM using two additional teeth per group.
Result:The highest µTBS values were verified to Sd and 24h storage. Ci and Ca, 6 months and 1 year presented similar bond strengths. The predominance of mixed and adhesive failures was verified for all groups.
Conclusion: Bonding with Sd showed µTBS values significant higher when compared to Ca or Ci dentin. Storage specimens decreased the µTBS values for all conditions.
Division: AADR/CADR Annual Meeting
Meeting:2014 AADR/CADR Annual Meeting (Charlotte, North Carolina) Location: Charlotte, North Carolina
Year: 2014 Final Presentation ID:236 Abstract Category|Abstract Category(s):Dental Materials 1: Adhesion - Bond Strength Testing and Mechanisms
Authors
Costa, Ana
( Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
)
Correr-sobrinho, Lourenço
( Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
)
Naves, Lucas
( Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
)
Raposo, Luis
( Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, , Brazil
)
Correr, Américo
( Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
)
Sinhoreti, Mário
( Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
)
Garcia-godoy, Franklin
( University of Tennessee Health Science Center, College of Dentistry, Memphis, TN, USA
)
Puppin-rontani, Regina
( Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
; Piracicaba Dental School, State University of Campinas, Piracicaba, , Brazil
)
SESSION INFORMATION
Poster Session
Adhesion to Different Materials
03/20/2014