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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

May/June 2011
Volume 13 , Issue 3



Pages: 267 - 277
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Effect of Cyclic Impact Load on Shear Bond Strength of Zirconium Dioxide Ceramics

Kawai, Naoko / Shinya, Akikazu / Yokoyama, Daiichiro / Gomi, Harunori / Shinya, Akiyoshi

Purpose: To investigate the influence of cyclic impact load and the number of load cycles on compressive shear bond strength under the three different cements. Materials and Methods: The following materials were used: Super Bond C&B (SB) and Panavia Fluoro Cement (PF) as adhesive resin cements, Fuji Luting (FL) as a resin-modified glass-ionomer cement, and zirconium dioxide ceramics as adherend. Before the shear bond test, three different impact loading conditions (compressive direction, shear direction, and no impact) and the number of load cycles (1 to 106 cycles), were performed. A total of 189 specimens (n = 3/group) were randomly assigned to groups and tested. A cyclic impact test was performed by applying a load of 98N at a distance of 40 mm and a loading cycle frequency of 1 Hz. All results were statistically analyzed with two-way ANOVA and Tukey’s multiple comparison test. Results: Shear bond strengths of SB, PF, and FL subjected to no cyclic impact load were 21.6 to 53.8 MPa in SB, 27.0 to 63.6 MPa in PF, and 20.0 to 35.9 MPa in FL. The shear bond strength of SB and PF increased to a certain degree from one to 105 cycles, while FL did likewise from one to 104 cycles. Conclusion: The shear bond strengths of SB, PF, and FL were greatest without cyclic impact, followed by compressive and then shear cyclic impact.

Keywords: zirconium dioxide, shear bond strength, cyclic impact load, adhesive cement, fatigue, prosthetic dentistry

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