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Influence of dentin and enamel pretreatment with acidic sulfur compounds on adhesive performance

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Abstract

Objective

This study tested the potential hampering effects of acidic sulfur compounds (ASC) containing hydroxybenzene sulfonic acid, hydroxymethoxybenzene sulfonic acid, and sulfuric acid, prior to self-etch and etch-and-rinse bonding procedures on enamel and dentin. According to the manufacturer, ASC should be applied after cavity preparation and prior to application of a primer in order to reduce the remaining biofilm in the preparation cavity. Despite promoted marketing, data on the investigated liquid are almost completely lacking.

Material and methods

One hundred and fifty-two extracted mandibular bovine incisors were embedded and polished to expose either enamel (E) or dentin (D). Then, specimens were randomly divided and conditioned as follows (n = 12/group): ASC and consecutive phosphoric acid application (E1/D1), ASC (E2/D2; E5/D5), phosphoric acid (E3/D3), and no conditioning (E4/D4; E6/D6). Groups were then treated with either Optibond FL® (etch-and-rinse; 1–4) or Clearfil SE Bond® (self-etch; 5–6). Hollow acrylic cylinders were bonded with a hybrid composite resin (Filtek Supreme XTE®) to the specimens, and the shear bond strength was measured (1 mm/min). In addition, failure types were assessed. Descriptive statistics and statistical analyses were performed with one-way ANOVA followed by the Scheffé post hoc test.

Results

For enamel, the highest shear bond strength values were obtained applying routine bonding procedures (23.5 ± 5.6 MPa for etch-and-rinse and 26.0 ± 6.0 MPa for self-etch, respectively). In contrast, dentin pretreatment with a combination of ASC and phosphoric acid led to the highest shear bond values (22.8 ± 4.1 MPa).

Conclusion

This study shows that ASC prior to dental restoration placement cannot be recommended for etch-and-rinse procedures on enamel but is appropriate for dentin without interfering with routine bonding procedures.

Clinical relevance

The application of acidic sulfur compounds prior to adhesive restoration placement should be restricted to dentin only as it may negatively influence shear bond strength on sound enamel.

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Acknowledgments

The authors would like to thank Albert Trottmann and Felix Schmutz for their support. We are grateful to EPIEN Medical for their support with the materials.

Conflict of interest

The authors declare no conflicts of interest.

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Authors and Affiliations

  1. Clinic for Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032, Zurich, Switzerland

    Alexis Ioannidis, Beatrice Sener, Thomas Attin & Patrick R. Schmidlin

  2. Department of Prosthodontics, Munich Dental School, Ludwig-Maximilians-University Munich, Munich, Germany

    Bogna Stawarczyk

Authors
  1. Alexis Ioannidis
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  2. Bogna Stawarczyk
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  3. Beatrice Sener
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  4. Thomas Attin
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  5. Patrick R. Schmidlin
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Correspondence to Patrick R. Schmidlin.

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Ioannidis, A., Stawarczyk, B., Sener, B. et al. Influence of dentin and enamel pretreatment with acidic sulfur compounds on adhesive performance. Clin Oral Invest 17, 1885–1892 (2013). https://doi.org/10.1007/s00784-012-0877-z

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  • DOI: https://doi.org/10.1007/s00784-012-0877-z

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