The Effect of 3% Phosphate Ascorbyl Gel on Bond Strength of Composite Resin to Enamel treated with 35% Hydrogen Peroxide
| Autor: | Adriana de Fátima Vasconcelos Pereira, Ana Silva, Monica Barros da Silva, Milena de Fátima Schalcher de Castro, Marcela Mayana Pereira Franco, Alice Carvalho Silva, Fausto da Silva Bramante, Darlon Martins Lima |
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| Rok vydání: | 2015 |
| Předmět: |
Dental Stress Analysis
Time Factors Surface Properties Composite number Inorganic chemistry Ascorbic Acid Composite Resins Antioxidants chemistry.chemical_compound Dental Materials Materials Testing Shear strength Animals Hydrogen peroxide Dental Enamel Tooth Bleaching Agents General Dentistry Light-Curing of Dental Adhesives Universal testing machine Enamel paint Bond strength Dental Bonding Temperature Water Hydrogen Peroxide Phosphate Resin Cements chemistry visual_art visual_art.visual_art_medium Cattle Adhesive Stress Mechanical Shear Strength Nuclear chemistry |
| Zdroj: | The journal of contemporary dental practice. 16(5) |
| ISSN: | 1526-3711 |
| Popis: | Objective To evaluate the effect of 3% phosphate ascorbyl gel (PA) in different times onto the microshear bond strength of composite resin (CR) to bovine enamel treated with 35% hydrogen peroxide (HP). Materials and methods Thirty enamel blocks of bovine incisors were made and divided into 5 groups (n = 6) with three specimens per group (n = 18), according to treatment: G1= No bleaching + CR; G2 = HP + CR after 15d; G3 = HP + CR after 24 hours; G4 = HP + PA (15 min) + CR after 24 hours; G5 = HP + PA (2 hours) + CR after 24 hours. The resin cylinders were made by Tygon matrices. Microshear bond strength test was performed using universal testing machine with a 50N load at a speed of 0.5 mm/min. Fracture modes were assessed by a stereomicroscope 40 ×. Microshear bond strength values were submitted to the analysis of variance (ANOVA) one-way and Tukey test (p < 0.05). Results G1 had significant results when compared to G3 and G5 (p < 0.01). However, G2, G3, G4 and G5 have showed no significant differences among groups (p > 0.05). Failure modes were categorized into adhesive (90%) and mixed (10%). Conclusion The use of 3% phosphate ascorbyl gel for 15 minutes was able to improve bond strength of composite resin to bleached bovine enamel, but when 3% phosphate ascorbyl gel was applied during 40 minutes it negatively interfered in the adhesion of the resin to bleached bovine enamel. How to cite this article de Castro MFS, Silva AC, Franco MMP, Silva APB, Bramante FS, da Silva MB, Lima DM, Pereira AFV. The Effect of 3% Phosphate Ascorbyl Gel on Bond Strength of Composite Resin to Enamel treated with 35% Hydrogen Peroxide. J Contemp Dent Pract 2015;16(5):376-382. |
| Databáze: | OpenAIRE |
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