Effect of various bleaching treatments on shear bond strength of different universal adhesives and application modes

Abstract

ObjectivesThe aim of this in vitro study was to evaluate the bond strength of 2 universal adhesives used in different application modes to bleached enamel.Materials and MethodsExtracted 160 sound human incisors were used for the study. Teeth were divided into 4 treatment groups: No treatment, 35% hydrogen peroxide, 16% carbamid peroxide, 7.5% carbamid peroxide. After bleaching treatments, groups were divided into subgroups according to the adhesive systems used and application modes (n = 10): 1) Single Bond Universal, etch and rinse mode; 2) Single Bond Universal, self-etch mode; 3) Gluma Universal, etch and rinse mode; 4) Gluma Universal, self-etch mode. After adhesive procedures nanohybrid composite resin cylinders were bonded to the enamel surfaces. All specimens were subjected to shear bond strength (SBS) test after thermocycling. Data were analyzed using a 3-way analysis of variance (ANOVA) and Tukey post hoc test.ResultsNo significant difference were found among bleaching groups (35% hydrogen peroxide, 16% carbamid peroxide, 7.5% carbamid peroxide, and no treatment groups) in the mean SBS values. There was also no difference in SBS values between Single Bond Universal and Gluma Universal at same application modes, whereas self-etch mode showed significantly lower SBS values than etch and rinse mode (p < 0.05).ConclusionsThe bonding performance of the universal adhesives was enhanced with the etch and rinse mode application to bleached enamel and non-bleached enamel.

Effect of Er: YAG Laser on Microtensile Bond Strength of Bleached Dentin to Composite

“…1 Evidence shows that adhesions of restorations decrease to freshly bleached enamel and dentin. [2][3][4] Several studies have assessed the impact of different bleaching agents on mechanical and morphological properties of the bonding interface. [5][6][7][8][9][10] The results of most studies have indicated decreased bond strength of restorative materials to bleached dentin.…”

Di̇ş Beyazlatma İşlemi̇ni̇n Li̇tyum Di̇si̇li̇kat Serami̇ği̇n Bağlanma Dayanimina Etki̇si̇

“…17,29 Beyazlatma işlemini takiben hidrojen peroksit ve karbamid peroksit uygulanmasına bağlı olarak, diş yüzeyinde veya iç kısımlarında kalan artık oksijenin "rezin siman-diş" bağlantısını inhibe ederek veya rezinin polimerizasyonunu engelleyerek bağlanma dayanımı değerlerini düşürdüğü bildirilmiştir . 16,19,[30][31][32] Ayrıca mine yüzeyinin pürüzlülüğünün ve porözitesinin artması, daha kısa ve az sayıda rezin tag oluşması, mikro sertlikteki düşüş, mine ve dentindeki mekanik özelliklerdeki ve kalsiyum, fosfor, sülfür ve potasyum miktarındaki değişiklikler de bağlanma dayanımını düşüren sebepler olarak bildirilmiştir. 33,34 Rostein ve arkadaşları 10 , beyazlatma ajanlarının diş dokusunda kalsiyum, fosfor, kükürt ve potasyum seviyesinde değişikliklere neden olduğunu ve Ca ile P oranındaki değişikliklerle hidroksiapatit yapının organik bileşenlerinde değişime sebep olduğu gösterilmiştir.…”

Bond Strength Comparison of Orthodontic Bonding Systems: A Systematic Review

“…In case of universal adhesive systems, there was no significant difference in SBS between convention etch-rinse and self-etch priming in dry condition but SBS decreased notably in etch-&-rinse technique after samples had been immersed in water or thermocycled 13 . Yet, Mclean et al 14 found that acid etching the enamel significantly improved bond strengths of the universal adhesives compared to self-etch-ing, but storage time did not significantly affect bond strengths. Katona et al 15 tested different strengths of bonding adhesives: in shear,traditional etch-&-rinse and priming produced a stronger bond than the single-step self-etch system.…”