Effect of sodium hypochlorite as dentinal pretreatment on bonding strength of adhesive systems

Autor: Anelise Fernandes Montagner, Jovito Adiel Skupien, Marciano Freitas Borges, Ivo Krejci, Tissiana Bortolotto, Alexandre Henrique Susin
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Indian Journal of Dental Research, Vol 26, Iss 4, Pp 416-420 (2015)
Druh dokumentu: article
ISSN: 0970-9290
1998-3603
DOI: 10.4103/0970-9290.167633
Popis: 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.
Databáze: Directory of Open Access Journals
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