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TiF4 improves microtensile bond strength to dentin when using an adhesive system regardless of primer/bond application timing and method

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Abstract

Objectives

This study evaluated the bond strength of a two-step conventional adhesive system to dentin pretreated with 2.5 % titanium tetrafluoride (TiF4) according to application timing (before or after acid conditioning) and primer/adhesive application method (active or passive).

Materials and methods

Dentin surfaces were randomly treated with different adhesive procedures (n = 6): etching with phosphoric acid (PA) + primer/adhesive (Adper Single Bond 2/3M ESPE) actively applied; PA + primer/adhesive passively applied; TiF4 before PA + primer/adhesive actively applied; TiF4 before PA + primer/adhesive passively applied; TiF4 after PA + primer/adhesive actively applied; and TiF4 after PA + primer/adhesive passively applied. A composite block was built onto the tooth, which was sectioned into sticks (adhesive area of approximately 1 mm2). Microtensile bond strength tests and the failure mode were determined.

Results

Two-way ANOVA revealed no significant interaction between TiF4 application timing and primer/adhesive application method (p = 0.184). The use of TiF4, before or after PA significantly increased bond strength values (p < 0.001). There was no significant difference in bond strength values when using TiF4 before or after PA. The primer/adhesive application method had no influence on bond strength, regardless of whether TiF4 was used (p = 0.906). Failure mode was predominantly adhesive.

Conclusions

The use of TiF4 promoted higher immediate bond strength to dentin. The conventional adhesive system may be applied either actively or passively, regardless of TiF4 application timing.

Clinical significance

Pretreatment with TiF4 increased bond strength in a conventional two-step adhesive system to dentin, regardless of the primer/adhesive application method and the timing of dentin pretreatment.

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Acknowledgments

The authors would like to thank CNPq foundation (Conselho Nacional de Desenvolvimento Científico e Tecnológico) for providing grants (process number 125925/2013-1) and LME/LNNano/CNPEM for the technical support during the electron microscopy work.

Conflict of interest

The authors declare that they have no competing interests.

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Authors and Affiliations

  1. Department of Restorative Dentistry, São Leopoldo Mandic Institute and Research Center, Rua José Rocha Junqueira, 13, Campinas, 13045-755, São Paulo, Brazil

    Juliana Bomfigli Tranquilin, Enrico Coser Bridi, Flávia Lucisano Botelho Amaral, Fabiana Mantovani Gomes França, Cecilia Pedroso Turssi & Roberta Tarkany Basting

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  1. Juliana Bomfigli Tranquilin
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  2. Enrico Coser Bridi
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  3. Flávia Lucisano Botelho Amaral
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  5. Cecilia Pedroso Turssi
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  6. Roberta Tarkany Basting
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Correspondence to Roberta Tarkany Basting.

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Tranquilin, J.B., Bridi, E.C., Amaral, F.L.B. et al. TiF4 improves microtensile bond strength to dentin when using an adhesive system regardless of primer/bond application timing and method. Clin Oral Invest 20, 101–108 (2016). https://doi.org/10.1007/s00784-015-1496-2

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  • DOI: https://doi.org/10.1007/s00784-015-1496-2

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