Effect of sodium hypochlorite as dentinal pretreatment on bonding strength of adhesive systems.
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Date
2015-07
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Abstract
Aim: This study aimed to evaluate the effect of sodium hypochlorite (NaOCl) pretreatment on
bond strength of adhesive systems to different dentin regions.
Materials and Methods: Forty human molars were randomly assigned according to different
adhesive systems (Adper Single Bond 2; Clearfil SE Bond; Adper SE Plus; G‑Bond),
pretreatments (control and NaOCl ‑ deproteinization) and dentin regions (proximal, superficial
occlusal [SO] and deep occlusal [DO]), n = 5. Cylindrical cavities were performed at the
proximal and occlusal surfaces of each sample. For deproteinization, 10% NaOCl was applied
on conditioned dentin for 60 s before the adhesive systems application. Two occlusal and one
proximal slice were obtained from each sample and submitted to the push‑out test. The mode of
fracture was analyzed. The data were subjected to three‑way ANOVA and Tukey test (P < 0.05).
Results: There was statistically significant difference between the adhesive systems (P < 0.01)
and dentin regions (P < 0.01); however, the pretreatment did not significantly affect the bond
strength values (P > 0.05). The bond strength values were higher for the proximal surface,
followed by SO and later by DO, being influenced by the adhesive system. The two‑step self‑etch
adhesive systems presented the highest bond strength results.
Conclusion: The deproteinization pretreatment showed similar bonding effectiveness to the
conventional adhesive technique. The dentin region plays a rule on the bond strength values.
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Keywords
Adhesive system, bond strength, dentin, dentin depth, sodium hypochlorite, Adhesive system, bond strength, dentin, dentin depth, sodium hypochlorite
Citation
Montagner Anelise Fernandes, Skupien Jovito Adiel, Borges Marciano Freitas, Krejci Ivo, Bortolotto Tissiana, Susin Alexandre Henrique. Effect of sodium hypochlorite as dentinal pretreatment on bonding strength of adhesive systems. Indian Journal of Dental Research. 2015 July-Aug; 26(4): 416-420.