Dental Materials
Volume 26, Issue 4 , Pages 345-352, April 2010

New zirconia primer improves bond strength of resin-based cements

  • Pascal Magne

      Affiliations

    • Division of Restorative Sciences, University of Southern California, Los Angeles, USA
    • Corresponding Author InformationCorresponding author at: University of Southern California, Division of Restorative Sciences, School of Dentistry, Oral Health Center, 3151 S. Hoover St., Los Angeles, CA 90089-7792, USA. Tel.: +1 213 740 4239; fax: +1 213 821 5324.
    • ,
  • Maria P.G. Paranhos

      Affiliations

    • Division of Restorative Sciences, University of Southern California, Los Angeles, USA
    • Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
    • ,
  • Luiz H. Burnett Jr

      Affiliations

    • Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil

Received 18 July 2009; received in revised form 26 October 2009; accepted 9 December 2009.

Abstract 

Objective

Various chemical interactions can be used to develop ceramic–resin bonding and specific approaches are available for zirconia ceramics. This study evaluated the effect of a new experimental primer, a mixture of organophosphate and carboxylic acid monomers, on the zirconia-to-resin shear bond strength (SBS).

Methods

Forty Y-TZP blocks (15×4×2mm) were embedded in an acrylic resin base, polished, Al2O3-sandblasted and randomly divided into eight groups. Three different resin-based luting agents (BisCem, Duo-Link, Panavia F) were used to build 2.4mm-diameter cylinders (n=15) onto the zirconia surface with and without the new experimental zirconia primer. The new primer was also tested with Z100 restorative composite resin cylinders. In addition, Panavia was used with its own primer (Clearfil Ceramic Primer). SBS testing was carried out after 24h of storage in water. Scanning electron microscopy (SEM) was used to evaluate the zirconia surface topography and failure mode.

Results

According to ANOVA and Tukey test (α=0.05), the association of the experimental primer with the restorative composite resin Z100 yielded the highest SBS (29.35MPa) followed by DuoLink with the new primer (26.68MPa). The groups that did not receive the experimental primer presented the lowest SBS values (from 5.95 to 9.79MPa). The failure mode was adhesive for the non-primed specimens and predominantly mixed in the primed groups.

Significance

The use of the new zirconia experimental primer based on organophosphate/carboxylic acid monomers increased the bond strength of different resin-based luting agents including Z100 restorative material.

Keywords: Bond strength, Shear test, Surface conditioning methods, Airborne-particle abrasion, Resin luting material, Zirconia ceramics

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PII: S0109-5641(09)00509-0

doi:10.1016/j.dental.2009.12.005

Dental Materials
Volume 26, Issue 4 , Pages 345-352, April 2010

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