Shear bond strength of orthodontic brackets bonded with a new self-adhering flowable resin composite
| Autor: | Marco Ferrari, Agostino Giovannetti, Cecilia Goracci, Mariam Margvelashvili, Alessandro Vichi |
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| Rok vydání: | 2011 |
| Předmět: |
Dental Stress Analysis
Curing Lights Dental Materials science Time Factors Orthodontic Brackets Surface Properties Resin composite Dentistry Dental bonding Composite Resins Stress (mechanics) chemistry.chemical_compound stomatognathic system Acid Etching Dental Etching (microfabrication) Shear strength Humans Phosphoric Acids Composite material Dental Enamel General Dentistry Phosphoric acid Light-Curing of Dental Adhesives Enamel paint Bond strength business.industry technology industry and agriculture Dental Bonding Temperature Adhesiveness Resin Cements chemistry visual_art visual_art.visual_art_medium Stress Mechanical business Shear Strength |
| Zdroj: | Clinical oral investigations. 17(2) |
| ISSN: | 1436-3771 |
| Popis: | This study aims to assess the shear bond strength (SBS) to enamel and the distribution of failure modes of brackets bonded using a new self-adhering flowable resin composite (Vertise Flow, VF), with or without preliminary phosphoric acid etching (PAE).Eighty extracted premolars were randomly divided into four groups (n = 20): (1) etch-and-rinse adhesive (ER), PAE/Transbond XT Primer/Transbond XT Paste (3M Unitek); (2) self-etch adhesive (SE), Transbond Plus Self-Etching Primer (3M Unitek)/Transbond XT Paste; (3) VF; (4) PAE/VF. In each group, 10 bracketed teeth were debonded within 30 min, while the remaining teeth were subjected to thermocycling before testing. SBS and adhesive remnant index were recorded.SE measured significantly lower early SBS than PAE/VF. Early SBSs recorded by VF were slightly higher yet statistically similar to those of ER. Such levels of adhesion were achieved by VF regardless of preliminary PAE. After thermocycling, VF measured the lowest SBS. When debonded early, VF and SE tended to leave less residues on enamel surface than ER. After thermocycling, the failure pattern changed significantly for VF and PAE/VF specimens that all exhibited adhesive failures at the tooth-bracket interface.VF achieved early bracket SBSs similar to ER. Following thermocycling, VF and PAE/VF manifested a significant decrease in SBS.Although the simplified handling and the satisfactory early SBS of VF may prompt its use for bracket bonding, the decrease in retention noted after thermocycling warns that the issue of bond durability should be thoroughly addressed prior to endorsing this clinical application of VF. |
| Databáze: | OpenAIRE |
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