Effects of air-abrasion pressure on the resin bond strength to zirconia: a combined cyclic loading and thermocycling aging study.
10.5395/rde.2017.42.3.206
- Author:
Eman Z AL-SHEHRI
1
;
Afnan O AL-ZAIN
;
Alaa H SABRAH
;
Sarah S AL-ANGARI
;
Laila AL DEHAILAN
;
George J ECKERT
;
Mutlu ÖZCAN
;
Jeffrey A PLATT
;
Marco C BOTTINO
Author Information
1. Division of Dental Biomaterials, Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, USA. mbottino@iu.edu
- Publication Type:Original Article
- Keywords:
Air-abrasion;
Bond strength;
Fatigue;
Panavia F 2.0;
Resin cement;
Thermocycling
- MeSH:
Adhesives;
Aging*;
Aluminum Oxide;
Fatigue;
Microscopy, Electron, Scanning;
Resin Cements
- From:Restorative Dentistry & Endodontics
2017;42(3):206-215
- CountryRepublic of Korea
- Language:English
-
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.
