Effects of air-abrasion pressure on the resin bond strength to zirconia: a combined cyclic loading and thermocycling aging study
| Autor: | Afnan O. Al-Zain, Laila Al Dehailan, Alaa H.A. Sabrah, Mutlu Özcan, Jeffrey A. Platt, Sarah S. Al-Angari, George J. Eckert, Eman Z. Al-Shehri, Marco C. Bottino |
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| Přispěvatelé: | University of Zurich |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope 610 Medicine & health 02 engineering and technology 10068 Clinic of Reconstructive Dentistry Air-abrasion 03 medical and health sciences 0302 clinical medicine Surface roughness Cyclic loading Cubic zirconia Resin cement Panavia F 2.0 Composite material Fatigue Bond strength 030206 dentistry General Medicine 021001 nanoscience & nanotechnology lcsh:RK1-715 Thermocycling lcsh:Dentistry CLTC Adhesive 0210 nano-technology Research Article Bar (unit) |
| Zdroj: | Restorative Dentistry & Endodontics, Vol 42, Iss 3, Pp 206-215 (2017) Restorative Dentistry & Endodontics |
| ISSN: | 2234-7666 2234-7658 |
| DOI: | 10.5395/rde.2017.42.3.206 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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