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ORIGINAL ARTICLE
Year : 2018  |  Volume : 18  |  Issue : 3  |  Page : 212-218

Comparison between shear forces applied on the overlay-dental tissue interface using different bonding techniques: An in vitro study


1 Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium
2 Department of Stomatology and Dentistry, Laboratory of Physiology and Pharmaceutics, Faculty of Medicine, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium

Correspondence Address:
Dr. Sibel Cetik
Department of Stomatology and Dentistry, Laboratory of Physiology and Pharmaceutics, Faculty of Medicine, Erasmus Hospital, Université Libre de Bruxelles, CP 604 Route de Lennik 808, 1070 Brussels
Belgium
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jips.jips_165_17

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Aim: The aim of this study was to compare the adhesion of glass-ceramic overlays to tooth structure, under the effect of shear forces, using different bonding systems. Materials and Methods: Thirty healthy lower third molars were selected and randomly allocated into three groups (n = 10). Group 1: overlays bonded to tooth structure using Panavia V5 with immediate dentin sealing (IDS); Group 2: overlays bonded using Panavia V5 without IDS; and Group 3: overlays bonded using heated composite combined with a bonding agent with IDS. All the restorations were made of glass-ceramic (Suprinity, Vita). The restored teeth were then stored in distilled water for 7 days and at room temperature. Shear forces were applied using a universal testing machine. Load and displacement were recorded at intervals of 0.1 s. A statistical analysis was used to compare the groups. Results: The mean resistance to fractures ± standard deviation obtained for the Groups 1, 2, and 3 was, respectively, 15.7440 ± 2.13, 12.0750 ± 1.41, and 8.33364 ± 2.85 MPa. The analysis of variance was highly significant (P < 0.001) allowing us to reject the null hypothesis of equality between the three groups. Comparisons between pairs also provided significant results. Conclusion: Bonding using Panavia V5 with IDS showed a better resistance to shear forces when compared to other bonding techniques. The application of IDS increased the adhesion.


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