AI Article Synopsis
- The study investigated how well multimode adhesive systems bond to tooth surfaces and the microscopic features of these bonds.
- The researchers compared adhesives in different application modes (self-etch and etch-and-rinse) on human molars and assessed their bond strength after either a short or long storage period.
- Results showed that while etching improved bond strength to enamel initially, this strength decreased after one year, and there's no significant difference in bond strength for dentin between multimode and control adhesives, highlighting that multimode adhesives generally perform similarly to traditional adhesives under varied conditions.
Article Abstract
Objectives: This study aimed to evaluate the ultramorphological characteristics of tooth-resin interfaces and the bond strength (BS) of multimode adhesive systems to enamel and dentin.
Methods: Multimode adhesives (Scotchbond Universal (SBU) and All-Bond Universal) were tested in both self-etch and etch-and-rinse modes and compared to control groups (Optibond FL and Clearfil SE Bond (CSB)). Adhesives were applied to human molars and composite blocks were incrementally built up. Teeth were sectioned to obtain specimens for microtensile BS and TEM analysis. Specimens were tested after storage for either 24 h or 1 year. SEM analyses were performed to classify the failure pattern of beam specimens after BS testing.
Results: Etching increased the enamel BS of multimode adhesives; however, BS decreased after storage for 1 year. No significant differences in dentin BS were noted between multimode and control in either evaluation period. Storage for 1 year only reduced the dentin BS for SBU in self-etch mode. TEM analysis identified hybridization and interaction zones in dentin and enamel for all adhesives. Silver impregnation was detected on dentin-resin interfaces after storage of specimens for 1 year only with the SBU and CSB.
Conclusions: Storage for 1 year reduced enamel BS when adhesives are applied on etched surface; however, BS of multimode adhesives did not differ from those of the control group. In dentin, no significant difference was noted between the multimode and control group adhesives, regardless of etching mode.
Clinical Relevance: In general, multimode adhesives showed similar behavior when compared to traditional adhesive techniques. Multimode adhesives are one-step self-etching adhesives that can also be used after enamel/dentin phosphoric acid etching, but each product may work better in specific conditions.
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Source |
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| http://dx.doi.org/10.1007/s00784-016-1966-1 | DOI Listing |
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