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Online ISSN 1827-174X
Luca MARIGO 1, Camillo D’ARCANGELO 2, Francesco De ANGELIS 2, Massimo CORDARO 3, Mirco VADINI 4, Carlo LAJOLO 5
1 Department of Operative Dentistry, School of Dentistry, Catholic University, Rome, Italy; 2 Department of Operative Dentistry, University of Chieti, Dental School, Chieti, Italy; 3 Department of Pediatric Dentistry, School of Dentistry, Catholic University, Rome, Italy; 4 Department of Operative Dentistry, University of Chieti, Dental School, Chieti, Italy; 5 Department of Oral Pathology, School of Dentistry, Catholic University, Rome, Italy
BACKGROUND: Purpose of this study was to evaluate the push-out bond strengths of four commercially available adhesive luting systems (two self-adhesive and two etch-and-rinse systems) after mechanical aging.
METHODS: Forty single-rooted anterior teeth were divided into four groups according to the luting cement system used: G1= Cement-One; G2= One-Q-adhesive Bond + Axia Core Dual; G3 = SmartCem 2; and G4 XP Bond + Core X flow. Anatomical Post were cemented in G1 and G2, and D.T. Light-Post Illusion were cemented in G3 and G4. All samples were subjected to masticatory stress simulation consisting of 300000 cycles applied with a computer-controlled chewing simulator. Push-out bond strength values (MPa) were calculated at cervical, middle, and apical each level, and the total bond strengths were calculated as the averages of the three levels. Statistical analysis was performed with data analysis software and significance was set at p<0.05.
RESULTS: Statistically significant differences in total bond strength were detected between the cements (G4=3.28 vs. G1=2.77 vs. G2=2.36 vs. G3=1.13 MPa; p<0.05). Specifically, G1 exhibited a lower bond strength in the apical zone, G3 exhibited a higher strength in this zone, and G2 and G4 exhibited more homogeneous bonding strengths across the different anatomical zones.
CONCLUSIONS: After artificial aging, etch-and-rinse luting systems exhibited more homogeneous bond strengths; nevertheless Cement-One exhibited a total bond strength second only to Core X Flow.