پديد آورندگان :
Mirzaei، Mansoreh نويسنده Assistant Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran , , Kermanshah، Hamid نويسنده , , Yassini، Esmaeil نويسنده Restorative Dentistry Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , , Ranjbar Omrani ، Ladan نويسنده Assistant Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran , , Abassi، Mehdi نويسنده Assistant Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Science. Tehran, Iran , , Akhondi، Nasrin نويسنده Asistant Professor, Department of Mathematics , South Tehran Branch, Islamic Azad university (IAU), Tehran, Iran , , Saniee، Razie نويسنده Dentist ,
چكيده لاتين :
Abstract
Background and Aim: some recent research have reported increased stability in mechanisms of adhesion to dentin in remove of collagen fiber of the dentin sur-face.The aim of this study was to evaluate the effect of sodium hypochlorite in mi-croleakage of three step total etch dental adhesives with different solvents.
Materials and Methods: this experimental study on 80 intact bovine incisor teeth,
were prepared class V cavities on buccal surface of teeth, box shap and all walls on
enamel.
Then the specimens were randomly divided into eight groups (n=10).
NaOCl+etching+ SBMP (waterbase), NaOCl+etching+ All Bond2 (Acetonebase),
etching+ NaOCl+ SBMP, etching+ NaOCl+ All Bond2,, NaOCl+ SBMP, NaOCl+ All
Bond2, etching+ SBMP, etching+ All Bond2.
Then the cavities were restored using Z250 (3M) composite and Coltolux 75 light cur-ing unit (350 mw/cm2). The specimens were thermo cycled for 1000 times on water baths of 5and 55oC. After thermocycling, the specimens were immersed in a 2 % aqueous solutions of basic fuchsin for 24 hours, then longitudinal section of each res-toration was obtained and examined with a stereomicroscope for evaluation of micro leakage. The data were analyzed using kruskal-walis test and the mean of micro lea-kage of samples were compared by two- way ANOVA test.
Results: The findings showed that the higher rate of micro leakage was detected in hypo+Acid and lower rate of micro leakage was detected in Acid+hypo in different treatment method. The finding was different in hypo+Acid procedure, the higher rate of micro leakage was in SBMP. In hypo groups, the microleakage with ALL Bond 2 was higher than SBMP. In control groups, the microleakage with SBMP was higher than ALL Bond2.
Conclusion: Application of Naocl before dentin etching for removal organic mate-rials increase the rate of microleakage of All Bond2 , SBMP to that of control group.
Key Words: Bonding , microleakage , collagen fiber
