Effect of Storage Time of a Ceramic Primer on Microshear Bond Strength to Zirconia

  • Amir Ghasemi Professor, Department of Restorative Dentistry, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  • Alireza Sadr Associate Professor, Department of Restorative Dentistry, School of Dentistry, University of Washington, Washington, USA
  • Anahita Pourhashemi 3Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Hormozgan University of Medical Sciences, Hormozgan, Iran
Keywords: Shear Strength, Ceramic Primer, Zirconium Oxide


Objective: This study assessed the effect of shelf life of a ceramic primer containing 10-methacryloyloxydecyl dihydrogen phosphate (MDP) monomer on microshear bond strength of zirconia ceramic to composite resin.

Materials and Methods: Sixty-four sintered zirconia samples (1.5×5×7 mm) were pretreated with Clearfil Ceramic Primer (CCP) at baseline and after one, two and six months of storage at 6°C. Composite cylinders were fabricated using Tygon tubes (1 mm height, 0.7 mm diameter) and placed on treated zirconia blocks, light-cured and subjected to microshear bond strength test. Mode of failure was determined under a stereomicroscope. Fourier-transform infrared spectroscopy (FTIR) was performed at each storage time point. Data were analyzed using one-way ANOVA and Tukey’s test. 

Results:  Significant differences were noted in microshear bond strength after six months of storage compared to baseline (P<0.05). Significant differences were noted in FTIR spectra at the four time points (P<0.05).

Conclusions: The effectiveness of one-component ceramic primer in bonding to zirconia was significantly affected by the storage of this material in a time-dependent manner. Visible new peaks and changes in FTIR spectra over time indicated alterations in the composition of ceramic primer affecting its shelf life.  


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How to Cite
Ghasemi A, Sadr A, Pourhashemi A. Effect of Storage Time of a Ceramic Primer on Microshear Bond Strength to Zirconia. Front Dent. 15(6):375-381.
Original Article