Effect of ozone gas on the shear bond strength to enamel
| Autor: | João Cardoso Ferreira, Sofia S.A. Oliveira, Patrícia T. Pires, Paulo Melo, Mário Jorge Silva |
|---|---|
| Přispěvatelé: | Repositório da Universidade de Lisboa |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Surface Properties Smear layer Acrylic Resins Temperature cycling Dental bonding Composite Resins Random Allocation Oxidants Photochemical Ozone Materials Testing Shear strength Animals Phosphoric Acids Dental enamel Dental Restoration Failure Composite material General Dentistry Universal testing machine Enamel paint Bond strength Original Articles lcsh:RK1-715 visual_art Dentin-Bonding Agents lcsh:Dentistry visual_art.visual_art_medium Microscopy Electron Scanning Methacrylates Cattle Adhesive |
| Zdroj: | Journal of Applied Oral Science, Vol 21, Iss 2, Pp 177-182 (2013) Journal of Applied Oral Science v.21 n.2 2013 Journal of applied oral science Universidade de São Paulo (USP) instacron:USP Journal of Applied Oral Science Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Journal of Applied Oral Science, Volume: 21, Issue: 2, Pages: 177-182, Published: APR 2013 |
| ISSN: | 1678-7765 |
| Popis: | Ozone is an important disinfecting agent, however its influence on enamel adhesion has not yet been clarified. Objective: Evaluate the influence of ozone pretreatment on the shear strength of an etch-and-rinse and a self-etch system to enamel and analyze the respective failure modes. Material and Methods: Sixty sound bovine incisors were used. Specimens were randomly assigned to four experimental groups (n=15): Group G1 (Excite® with ozone) and group G3 (AdheSE® with ozone) were prepared with ozone gas from the HealOzone unit (Kavo®) for 20 s prior to adhesion, and groups G2 (Excite®) and G4 (AdheSE®) were used as control. Teeth were bisected and polished to simulate a smear layer just before the application of the adhesive systems. The adhesives were applied according to the manufacturer's instructions to a standardized 3 mm diameter surface, and a composite (Synergy D6, Coltene Whaledent) cylinder with 2 mm increments was build. Specimens were stored in 100% humidity for 24 h at 37°C and then subjected to a thermal cycling regimen of 500 cycles. Shear bond tests were performed with a Watanabe device in a universal testing machine at 5 mm/min. The failure mode was analyzed under scanning electron microscope. Means and standard deviation of shear bond strength (SBS) were calculated and difference between the groups was analyzed using ANOVA, Kolmogorov-Smirnov, Levene and Bonferroni. Chi-squared statistical tests were used to evaluate the failure modes. Results: Mean bond strength values and failure modes were as follows: G1- 26.85±6.18 MPa (33.3% of adhesive cohesive failure); G2 - 27.95±5.58 MPa (53.8% of adhesive failures between enamel and adhesive); G3 - 15.0±3.84 MPa (77.8% of adhesive failures between enamel and adhesive) and G4 - 13.1±3.68 MPa (36.4% of adhesive failures between enamel and adhesive). Conclusions: Shear bond strength values of both adhesives tested on enamel were not influenced by the previous application of ozone gas. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|