| Autor: |
Jacinta Moraes Coelho Santos, Maria, Podorieszach, Aaron, Sami Rizkalla, Amin, Coelho Santos Jr., Gildo |
| Předmět: |
|
| Zdroj: |
Compendium of Continuing Education in Dentistry (15488578); Nov/Dec2013 Supplement, p19-24, 6p |
| Abstrakt: |
OBJECTIVE: To evaluate the microleakage and bond strengths (μTBS) of silorane-based (SBC) and dimethaciylate-based (DBC) restorative systems. The null hypotheses are: 1) there is no difference in microleakage between the resin composites and the adhesive systems tested at the enamel and dentin margins; 2) there is no significant difference in μTBS between the composite restorative systems using self-etch and etch-and-rinse adhesive versions. METHODS AND MATERIALS: Microleakage: Class V cavity preparations with cervical margin in dentin were performed on pristine extracted human molars and were randomly distributed among the following three groups: Group 1-DBC/etch-and-rinse adhesive system (Filtek™ Supreme Ultra/Adper™ Single Bond Plus [3M ESPE, www.3MESPE.com]); Group 2-SBC/self-etch adhesive (Filtek™ LS Low Shrink Posterior Restorative System/LS self-etch adhesive [3M ESPE]); Group 3-DBC/self-etch adhesive (Filtek Supreme Ultra/ Adper Easy Bond Self-Etch [3M ESPE]). Restorations were thermocycled and immersed in 0.2% methylene blue dye for 24 hours. Samples were assessed visually under 10x magnification; μTBS: Bond sticks (0.9 mm²) were prepared from each group and tested on a universal testing machine. RESULTS: The Kruskal-Wallis test revealed no significant difference in microleakage among the experimental groups at the enamel margin (P = 0.191). At the dentin margins, silorane/self-etch restorative system showed significantly less leakage than the dimethacrylate/etch-and-rinse restorative system (P = 0.008). Tukey's B rank order test showed that the dimethacrylate/etch-and-rinse restorative system presented the highest μTBS. CONCLUSIONS: SBC/self-etch system showed less microleakage at the dentin margins, while DBC/etch-and-rinse system presented higher bond strength. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
