Evaluation of the bond strength between aged composite cores and luting agent |
| |
Authors: | Serdar Polat Fatma Cebe Alir?za Tun?demir Caner ?ztürk Asl?han ü?ümez |
| |
Institution: | 1.Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.;2.Department of Restorative, Faculty of Dentistry, Abant İzzet Baysal University, Bolu, Turkey.;3.Department of Prosthodontics, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey.;4.Department of Prosthodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey.;5.Department of Prosthodontics, Faculty of Dentistry, Bezmi Alem University, Istanbul Turkey. |
| |
Abstract: | PURPOSEThe aim of this study was to evaluate effect of different surface treatment methods on the bond strength between aged composite-resin core and luting agent.MATERIALS AND METHODSSeventy-five resin composites and also seventy-five zirconia ceramic discs were prepared. 60 composite samples were exposed to thermal aging (10,000 cycles, 5 to 55℃) and different surface treatment. All specimens were separated into 5 groups (n=15): 1) Intact specimens 2) Thermal aging-air polishing 3) Thermal aging- Er:YAG laser irradiation 4) Thermal aging- acid etching 5) Thermal-aging. All specimens were bonded to the zirconia discs with resin cement and fixed to universal testing machine and bond strength testing loaded to failure with a crosshead speed of 0.5 mm/min. The fractured surface was classified as adhesive failure, cohesive failure and adhesive-cohesive failure. The bond strength data was statistically compared by the Kruskal-Wallis method complemented by the Bonferroni correction Mann-Whitney U test. The probability level for statistical significance was set at α=.05.RESULTSThermal aging and different surface treatment methods have significant effect on the bond strength between composite-resin cores and luting-agent (P<.05). The mean baseline bond strength values ranged between 7.07 ± 2.11 and 26.05 ± 6.53 N. The highest bond strength of 26.05 ± 6.53 N was obtained with Group 3. Group 5 showed the lowest value of bond strength.CONCLUSIONAppropriate surface treatment method should be applied to aged composite resin cores or aged-composites restorations should be replaced for the optimal bond strength and the clinical success. |
| |
Keywords: | Bonding Composite resin Er-YAG laser |
|
|