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Examining the effects of acid etching duration on the bond strength between two CAD/CAM materials and one composite resin

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Abstract

This study aimed to evaluate the effect of three hydrofluoric acid (HF) etching periods on the micro-tensile bond strength between two CAD–CAM ceramic systems [Vita Suprinity (VS) and feldspathic CEREC blocs (CB)] and a composite resin. The ceramics were categorized into six groups based on the surface conditioning protocol used, as follows: G1: CB-HF 5% for 20 s; G2: CB-HF 5% for 40 s; G3: CB-HF 5% for 60 s; G4: VS-HF 5% for 20 s; G5: VS-HF 5% for 40 s; G6: VS-HF 5% for 60 s. Scotchbond Universal was applied onto the pretreated ceramic surfaces and covered with Filtek Z350 XT composite resin. After 24 h, the specimens were cut into microbars (n = 16) and a micro-tensile bond strength test (μTBS) was carried out. An optical microscope was used to examine the fractured microbars. The results showed statistically significant differences between the factors tested (p < 0.01). Moreover, the mean MPa of G1(17.27), G2(13.03), G3(12.82), G4(15.83), G5(21.66), and G6(14.50) was seen to significantly differ. The predominant failure type observed was adhesive, and all three periods of HF etching produced satisfactory bonding between the composite resin and CB. An etching time of 40 s provided the highest μTBS value for VS.

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The authors did not receive support from any organization for the submitted work. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript.

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Authors and Affiliations

  1. São Leopoldo Mandic School of Dentistry, Post Graduate Program, Porto Alegre, RS, Brazil

    Patrícia Fernandes Jerzewski Sotero da Cunha

  2. Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS) School of Dentistry, Av. Ipiranga, 6681–Building 6, Porto Alegre, Rio Grande Do Sul, 90619-900, Brazil

    Julieta Gomes Tavares, Ana Maria Spohr, Mariá Cortina Bellan, Caroline Hoffmann Bueno & Laura Irgang Cardoso

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  1. Patrícia Fernandes Jerzewski Sotero da Cunha
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  2. Julieta Gomes Tavares
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  3. Ana Maria Spohr
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  5. Caroline Hoffmann Bueno
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Correspondence to Laura Irgang Cardoso.

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da Cunha, P.F.J.S., Tavares, J.G., Spohr, A.M. et al. Examining the effects of acid etching duration on the bond strength between two CAD/CAM materials and one composite resin. Odontology 110, 113–119 (2022). https://doi.org/10.1007/s10266-021-00644-x

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  • DOI: https://doi.org/10.1007/s10266-021-00644-x

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