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2005, vol. 9, br. 3, str. 198-203
Shear bond strength of 4 current adhesives in caries-affected dentin
(naslov ne postoji na srpskom)
Aristotle University, School of Dentistry, Department of Operative Dentistry, Thessaloniki

e-adresam_stergiou@hotmail.com
Ključne reči: dentin bonding agents; caries-affected dentin; shear Bond strength; thermal cycling
Sažetak
(ne postoji na srpskom)
Objective: To evaluate the shear bond strength of 4 current dentin adhesives in caries-affected dentin, after thermocycling. Methods: The materials used were Prompt-L-Pop, Gluma Comfort Bond, Clearfil SE Bond and Nano-Bond. 80 freshly extracted human molars were used. 40 of them had proximal caries (group A). After the removal of carious lesions, the molars were cut in order to obtain flat surfaces. Surfaces were bonded with Prompt-L-Pop, Gluma Comfort Bond, Clearfil SE Bond or Nano-Bond, according to manufacturers’ recommendations. Composite resins were added to the surfaces by packing the material into a cylindrical-shaped plastic matrix. After storage of the specimens in distilled water for 10 days, half of the specimens with each material were submitted to 3.000 thermal cycles (50; -370; -550; -370C). The other 40 teeth were healthy human molars (group B), which were submitted to the same process. All of the specimens were loaded to shear forces at a rate of 0.5 mm/min until failure. Statistical analysis was performed with 3-Way ANOVA at the level of significance p<0.05. Results: All adhesives attained higher shear bond strengths in the normal dentin (control, group B), than in the caries-affected dentin (group A). Significantly lower results were obtained using the adhesives Prompt-L-Pop and Gluma Comfort Bond compared to Nano-Bond and Clearfil SE Bond. Thermal-cycled specimens attained lower shear bond strengths. Conclusion: The results suggested that the altered structure of caries-affected dentin reduce the adhesion performance of resins.
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jezik rada: engleski
vrsta rada: izvorni članak
objavljen u SCIndeksu: 02.06.2007.