Effect of 2% Chlorhexidine on the Bond Strength of Two Adhesive Systems to Human Dentin

Camilla Regina Galvão BENGTSON, Antonio Lucindo BENGTSON, Nadya Galvão BENGTSON, Miriam Lacalle TURBINO

Abstract


Objective: To evaluate in vitro the influence of 2% chlorhexidine digluconate solution on the bond strength of two adhesive systems (one etch-and-rinse and one self-etching adhesive system) to human molar dentin. Method: Forty sound human third molars were selected and had their occlusal face ground to expose a flat dentin surface. The teeth were randomly assigned to 4 groups (n=10) according to the adhesive system and surface treatment performed: G1 – control Single Bond 2; G2 – Control Clearfil SE Bond; G3 – Disinfection with chlorhexidine + Single Bond 2; G4 – Disinfection with chlorhexidine + Clearfil SE Bond. Composite resin specimens were built on the treated surfaces and the teeth were stored in distilled water at 37ºC for 24 hours. The specimens were sectioned longitudinally to obtain sticks with cross-sectional area of approximately 0.8 mm2, which were tested in microtensile strength in a universal testing machine. Bond strength data were analyzed statistically by ANOVA and Tukey’s test (p<0.05). Dentin discs obtained from 3 additional teeth were subjected to the same surface treatments performed for the microtensile bond strength test and analyzed under scanning electron microscopy. Results: There were no statistically significant differences between the control groups (G1 = 31.52 ± 6.24 and G2 = 42.88 ± 2.31) and the groups treated with chlorhexidine (G3 = 34.41 ± 6.92 and G4 = 40.14 ± 2.91). Clearfil SE Bond presented significantly higher bond strength meas than Single Bond 2. Conclusion: The 2% chlorhexidine digluconate solution did not interfere with the bond strength of the tested adhesive systems to dentin.

Keywords


Adesivos dentinários; Clorexidina; Desinfetantes; Dentin-Bonding Agents; Chlorhexidine; Disinfectants.



DOI: http://dx.doi.org/10.4034/pboci.v8i1.238

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