Influence of chlorhexidine on longitudinal bond strength to dentin: in vitro study

Authors

  • Beatriz Maria Fonseca São Paulo State University (Unesp) – Institute of Science and Technology – Clinical Research Academic Group – São José dos Campos – SP – Brazil.
  • Daphne Camara Barcellos São Paulo State University (Unesp) – Institute of Science and Technology – Clinical Research Academic Group – São José dos Campos – SP – Brazil.
  • César Rogério Pucci São Paulo State University (Unesp) – Institute of Science and Technology – Department of Restorative Dentistry – São José dos Campos – SP - Brazil.
  • Eduardo Bresciani São Paulo State University (Unesp) – Institute of Science and Technology – Department of Restorative Dentistry – São José dos Campos – SP - Brazil.
  • Maria Amélia Máximo de araújo São Paulo State University (Unesp) – Institute of Science and Technology – Clinical Research Academic Group – São José dos Campos – SP – Brazil.

DOI:

https://doi.org/10.14295/bds.2017.v20i1.1315

Abstract

Objective: This study evaluated the effect of 0.2% chlorhexidine gluconate solution used as an therapeutic primer on the long-term bond strength of etch-and-rinse adhesive to dentin. Material and Methods: Bovine incisors were worn to expose an area of dentin and were divided into 2 groups: Group C (Control) - acid etching with 37% phosphoric acid + Single Bond; Group CHX (0.2% CHX) - acid etching with 37% phosphoric acid + 0.2% CHX for 30 s + Single Bond. Blocks of composite were fabricated and stored for 24 h or 6 months, sectioned into beams and submitted to microtensile tests. Results were analyzed by two-way ANOVA and Tukey tests. Results: Mean (±SD) values (in MPa) were as follow: Group CHX/24h - 41.8(±2.62)A; Group C/24h - 40.8(±3.35)AB; Group CHX/6 months – 36.4(±3.52)B; Group CHX/6 months - 26.1(±1.54)C. Conclusion: CHX improve the imediatte bond strength of resin-dentin and significantly lowered the loss of bond strength after 6 months water storage as seen in the control bonds.

Keywords

Tensile bond strength; Dentin; Total-etch adhesives; Chlorhexidine gluconate.

Author Biography

Daphne Camara Barcellos, São Paulo State University (Unesp) – Institute of Science and Technology – Clinical Research Academic Group – São José dos Campos – SP – Brazil.

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Published

2017-02-20

Issue

Vol. 20 No. 1 (2017): Jan. - Mar. / 2017 - Published February 2017

Section

Clinical or Laboratorial Research