Effects of air-abrasion pressure on the resin bond strength to zirconia: a combined cyclic loading and thermocycling aging study
Al Shehri Eman Z., Al Zain Afnan O., Sabrah Alaa H., Al Angari Sarah S., Al Dehailan Laila, Eckert George J., Platt Jeffrey A., Ozcan Mutlu, Bottino Marco C.,
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( Al Shehri Eman Z. ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
( Al Zain Afnan O. ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
( Sabrah Alaa H. ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
( Al Angari Sarah S. ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
( Al Dehailan Laila ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
( Eckert George J. ) - Indiana University School of Medicine Department of Biostatistics
( Platt Jeffrey A. ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
( Ozcan Mutlu ) - University of Zurich Centre for Dental and Oral Medicine
( Bottino Marco C. ) - Indiana University School of Dentistry Department of Biomedical and Applied Sciences
KMID : 1034420170420030206
Abstract
Objectives: To determine the combined effect of fatigue cyclic loading and thermocycling (CLTC) on the shear bond strength (SBS) of a resin cement to zirconia surfaces that were previously air-abraded with aluminum oxide (Al2O3) particles at different pressures.
Materials and Methods: Seventy-two cuboid zirconia specimens were prepared and randomly assigned to 3 groups according to the air-abrasion pressures (1, 2, and 2.8 bar), and each group was further divided into 2 groups depending on aging parameters (n = 12). Panavia F 2.0 was placed on pre-conditioned zirconia surfaces, and SBS testing was performed either after 24 hours or 10,000 fatigue cycles (cyclic loading) and 5,000 thermocycles. Non-contact profilometry was used to measure surface roughness. Failure modes were evaluated under optical and scanning electron microscopy. The data were analyzed using 2-way analysis of variance and χ2 tests (α = 0.05).
Results: The 2.8 bar group showed significantly higher surface roughness compared to the 1 bar group (p < 0.05). The interaction between pressure and time/cycling was not significant on SBS, and pressure did not have a significant effect either. SBS was significantly higher (p = 0.006) for 24 hours storage compared to CLTC. The 2 bar-CLTC group presented significantly higher percentage of pre-test failure during fatigue compared to the other groups. Mixed-failure mode was more frequent than adhesive failure.
Conclusions: CLTC significantly decreased the SBS values regardless of the air-abrasion pressure used.
키워드
Air-abrasion; Bond strength; Fatigue; Panavia F 2.0; Resin cement; Thermocycling
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