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논문 기본 정보

자료유형
학술저널
저자정보
Eman Z. Al-Shehri (Indiana University School of Dentistry) Afnan O. Al-Zain (Indiana University School of Dentistry) Alaa H. Sabrah (The University of Jordan College of Dentistry) Sarah S. Al-Angari (King Saud University College of Dentistry) Laila Al Dehailan (University of Dammam College of Dentistry) George J. Eckert (Indiana University School of Medicine) Mutlu Özcan (University of Zurich Switzerland) Jeffrey A. Platt (Indiana University School of Dentistry) Marco C. Bottino (Indiana University School of Dentistry)
저널정보
대한치과보존학회 Restorative Dentistry and Endodontics Restorative Dentistry and Endodontics 제42권 제3호
발행연도
2017.8
수록면
206 - 215 (10page)

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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.

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