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CC BY-NC-ND 4.0 · Eur J Dent 2018; 12(04): 553-558
DOI: 10.4103/ejd.ejd_239_18
Original Article
Dental Investigation Society

Effect of adhesive mode and chlorhexidine on microtensile strength of universal bonding agent to sound and caries-affected dentins

Joyce Figueiredo Macedo de Lima
1   Department of Restorative Dentistry, Piracicaba School of Dentistry, Unicamp, Piracicaba, Sao Paulo, Brazil
,
Danielle Wajngarten
2   Department of Social Dentistry, Araraquara Dental School, Sao Paulo State University (UNESP), Araraquara, Sao Paulo, Brazil
,
Fariya Islam
3   Department of General Dentistry, Stony Brook University, School of Dental Medicine, NY, USA
,
Johanna Clifford
3   Department of General Dentistry, Stony Brook University, School of Dental Medicine, NY, USA
,
Ana Carolina Botta
3   Department of General Dentistry, Stony Brook University, School of Dental Medicine, NY, USA
› Author Affiliations
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Publication History

Publication Date:
23 September 2019 (online)

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ABSTRACT

Objective: The main objective of this study is to assess the effect of the adhesive mode and chlorhexidine (CHX) on the microtensile strength of a universal bonding agent to sound and caries-affected dentins. Materials and Methods: Six intact third molars and six decayed third molars were sectioned to obtain two middle dentin specimens per tooth. Prime and Bond Elect Universal (Dentsply) was applied to specimens in two different modes: Etch-and-rinse (ER, phosphoric acid for 15s) and self-etch (SE, no phosphoric acid). 2% CHX (Cavity Cleanser, Bisco) was applied to both dentins for 30 s. Specimens were randomly assigned into eight groups (n = 3) according to the treatments applied to sound and caries-affected dentins: SE; ER; SE + CHX; and ER + CHX. All specimens were restored with TPH Spectra High Viscosity (Dentsply) composite resin and sectioned to obtain specimens of 0.8 ± 0.1 mm2. The microtensile bond strength test was conducted at 1 mm/min. The data were statistically analyzed by ANOVA and multiple comparisons' test (α = 0.05). Results: There was no significant difference between sound dentin and caries-affected dentin (P = 0.132). The highest bond strength was obtained with the application of the ER (31.81MPa). SE + CHX promoted the lowest bond strength with no statistical difference to ER + CHX (P > 0.05). Conclusions: ER mode for the universal bonding agent yielded the highest bond strength to sound and caries-affected dentins. CHX reduced the bond strength to both dentins regardless the application of phosphoric acid. Clinical Significance: The universal bonding agent increased the bond strength to sound and caries-affected dentins when applied by the ER mode.

Key words:

Acid etching - chlorhexidine - dentin - dentin adhesives - tensile strength
 

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